Ideas, potential and enthusiasm are easy; sticking with something, especially something untested/untried, especially something that may fail, now that's hard.

Ideas, potential and enthusiasm are easy; sticking with something, especially something untested/untried, especially something that may fail, now that's hard. Most people don't have the stamina, and there's so many possibilities (how do you pick the "right" one?) and never enough time (between family, day job, etc, etc).