I got caught up on specific features that would take me 4 months to implement. Like i was going to make a city builder and came up with a way to make dynamic realsitic roads with no compromises. Worked flawlessly, but thats not a game and i am one guy. Thats jusy one example, but the gist of it is i wasted too much time on single things and not just saying "make a simple clone of something start to finish".