[incan1275]

I would say don't be too hard on yourself. It's difficult to find something you're passionate about and have it practically used by many people.

The best thing you could do is actually work on side projects related to your paid work. Come up with an idea, prototype it, demo it and convince your boss/peers that it's something beneficial for you or the company. Many obvious examples where a lot of successful applications first came up as someone's side project at work.