You have to steal some blinds. I used to play tight but have loosened up a lot. You have to learn not to be afraid when bets and blinds get higher. As for those guys who go all in, try to catch them when they are bluffing
or on draw. Keep track of how many times they go all in. They cant be that lucky to have a hand every time. I recently had a guy that had went all in a bunch of times in a tourney. I had a pair of kings and called . He went all in on a bluff with 2-3. Needless to say he got caught big time.