when I first started playing I didn't know much about odds, so I was losing a lot of inside straight draws (imagine that). One in particular used to be especially unlucky....Drawing to jacks. ex. Have A 10, KQ on board, seemed like jacks NEVER came. For a good three months I would fold anything that required drawing to a jack...
Now I know that it doesn't matter if it is a jack or any other 4 out situation, still a crappy draw, in most situations at least.