I'm a Tech guy in Linux Business, decided to go live with my own business. What product or service should I focus on?

It varies and it's very very specific to what you want to develop. The concrete design of your circuit matters. Also prototype building costs are usually a factor 10-100 higher than series. If you already have your prototype then you can shop around various manufacturing companies. To do that, you need Gerber files (your PCB design) and a bill of materials. You also need to think about casing: designing it and creating the mold is expensive. If you don't have your prototype yet, I recommend having it engineered in eastern Europe. Custom engineering is cheap there and high quality. IP protection is a problem. One thing to do is to distribute the work to different manufacturers. For the design phase you are safer if you design your prototype in Europe or the US where international patent laws apply. I could give you more specific advise in a phone call, getting to know a bit better what you are trying to build.

Yes. Who I would recommend would depend on what you'd like to see happen. Are you building only for iOS, or only for Android, or both? Will you have a bunch of content/stuff in your app or just a little? Are you thinking game or non-game app? Do you already have a big fanbase or would you be trying to build one while building the app? It's easy to save a bunch of money on mobile development if you know how, and even easier to overspend. Making an app can be a ton of fun or a major headache. I'd recommend the fun. So if you want an outside perspective, give me a ring.

2 different categories come to mind. H&R Block or other tax preparation services. The second is restaurants. This may seem like a product more than a service but I think it truly falls into the category of service, especially if you look at the national chains. Think Applebee's, TGI Fridays etc. The reason people go to these places is because of the experience they receive. The franchisors have created a system that generates nearly identical results nationwide. The first thing you need to do is figure out what makes your service superior to others out there, then you need to figure out how and why this is the case. From there you need to document it and make sure that you have a mechanism in place to ensure compliance. Granted that is a huge amount of work, but the basic premise is quite simple. You want all of the people you hire to do things more or less the way you would do them.

I think there are great lessons to be learned from Exec. They started out wide, but have gone very deep on cleaning. It depends on the core thesis of your vision. Do you have a different product experience that could be competitive to existing marketplaces? Or are you just going for land-grab? The most important thing to understand about the services marketplace business is that it's a very localized business operation. I believe that if you're just looking to make money, the best way to do this is to go to "secondary markets" and build up marketplaces with a plan to sell to someone who has already raised great VC and has a presence in the major markets. If you are looking to compete in major market cities, then the safer bet is to find the very deep opportunity unless you really believe your customer experience can beat the established players. Happy to talk this through with you in more detail.

Whoa, start by reading the Lean book again; you're questions suggest you are making a classical mistake made by too many entrepreneurs who live and breath Lean Startup. An MVP is not the least you can show someone to evaluate whether or not building it is a good idea; an MVP is, by it's very definition, the Minimum Viable Product - not less than that. What is the minimum viable version of a professional collaboration network in which users create a professional profile visible to others? A website on which users can register, have a profile, and in some way collaborate with others: via QA, chat, content, etc. No? A minimum viable product is used not to validate if something is a good idea but that you can make it work; that you can acquire users through the means you think viable, you can monetize the business, and that you can learn from the users' experience and optimize that experience by improving the MVP. Now, that doesn't mean you just go build your MVP. I get the point of your question, but we should distinguish where you're at in the business and if you're ready for an MVP or you need to have more conversations with potential users. Worth noting, MOST entrepreneurs are ready to go right to an MVP. It's a bit of a misleading convention to think that entrepreneurs don't have a clue about the industry in which they work and what customers want; that is to say, you shouldn't be an entrepreneur trying to create this professional collaboration network if you don't know the market, have done some homework, talked to peers and friends, have some experience, etc. and already know that people DO want such a thing. Presuming you've done that, what would you present to potential users BEFORE actually building the MVP? For what do you need nothing more than some slides? It's not a trick question, you should show potential users slides and validate that what you intend to build is the best it can be. I call it "coffee shop testing" - build a slide of the homepage and the main screen used by registered users; sit in a coffee shop, and buy coffee for anyone who will give you 15 minutes. Show them the two slides and listen; don't explain, ONLY ask.... - For what is this a website? - Would you sign up for it? Why? - Would you tell your friends? Why? - What would you pay for it? Don't explain ANYTHING. If you have to explain something, verbally, you aren't ready to build your MVP - potential customers don't get it. Keep working with that slide alone until you get enough people who say they will sign up and know, roughly, what people will pay. THEN build your MVP and introduce it first to friends, family, peers, etc. to get your earliest adopters. At some point you're going to explore investors. There is no "ready" as the reaction from investors will entirely depend on who you're talking to, why, how much you need, etc. If you want to talk to investors with only the slides as you need capital to build the MVP, your investors are going to be banks, grants, crowdfunding, incubators, and MAYBE angels (banks are investors?! of course they are, don't think that startups only get money from people with cash to give you for equity). Know that it's VERY hard to raise money at this stage; why would I invest in your idea when all you've done is validate that people probably want it - you haven't built anything. A bank will give you a loan to do that, not many investors will take the risk. Still, know not that your MVP is "ready" but that at THAT stage, you have certain sources of capital with which you could have a conversation. When you build the MVP, those choices change. Now that you have something, don't talk to a bank, but a grant might still be viable. Certainly: angels, crowdfunding, accelerators, and maybe even VCs become interested. The extent to which they are depends on the traction you have relative to THEIR expectations - VCs are likely to want some significant adoption or revenue whereas Angels should be excited for your early adoption and validation and interested in helping you scale.