Don't forget, most people are doing the same thing and although people are comfortable with slight change, they crave more. 

Asking who 3 competitors are is never enough. There's never just 3 competitors. 
A better question is: who are my competitors and what are their resources? 

If you're going into a start up, make sure you like the work you do, and don't dive in head first into a bottomless sea of sharks... Unless you know you can swim.
Start small. Don't grow too fast. Only give up when you know that progression in the current trajectory would be fatal. (Financially or other)

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