Analyze it, figure out what you thing you could have changed and then…
Consider it practice and try again with something different.
There is no science to success at new ventures. Some are way better at figuring out the variables that can influence probabilities, but at the end of the day some things just aren’t quantifiable and the risk is never zero.
So why not just start on your next idea?
Trying again helps lessen that feeling of the fact that you suck. And don’t worry, there is nothing like working on something new to completely make you feel like your an idiot at some level. But guess what, everyone’s been there, and if you haven’t then your incredibly lucky.
There is nothing like tasting a bit of defeat to motivate the crap out of you.
So while your pondering that and want to get into something cool, I tend to spend my extra time building things.