Its simple but not so simple..
You want to be clear on what you want.. Take something that you are great at. NOT GOOD AT. Great at.. Work on that particular skill. I would say be great with people. Because when you are great with people. You can have great products and bad products and still have people coming back for more..

Understand the 3 Ps of business.

People
Product
Production

I know people buy bad products all the time like Fords and Nissans But people keep buying not because of marketing its because of great service..

Once you are great at understanding human behavior and people great character out markets other bad businesses..

Theres a book called Skill With People by Les Gibil.. and E-Myth by Michael E Gerber..

Read both of those books.. They are both on how to scale and how to be good with people. When you are good with people. People talk about you and your services. Then they have their friends and family come to you.

Hope this helps..