Say you come up with a novel idea where you can't get any protection through patents etc. Whats the best way to protect yourself from the competition that will arise after you? For example. there is a company called Panna (pannacooking.com) that offers video cooking recipes. Novel idea, but nothing prevents someone from doing the same thing I don't think. What would a company like this do to fend off and compete with new comers in the market.
Deliver an OUTRAGEOUS customer experience.
Anyone can copy an app, a product, a service, or an idea. It's silly to try to step on, stop, or otherwise spend much time thinking about your competition.
Be awesome and you'll always lead your industry.