Startup Quote: Jeremy Stoppelman, co-founder, Yelp

This is of course true, but ironically, something that is taught in design school and not business school. The most successful designs (and what isn't design?) are made when the author/creator doesn't get attached personally to any idea, sets them aside to create new ones, and learns how to "kill the babies" (critically attacking or dropping an idea/plan). Assuming your idea is good to go and getting right to the details (i.e. programming) is probably certain death for you. Reiterate, reiterate, reiterate. The best idea is almost never the first one.