I'm playing an 8 persons tournament tonight and I was wondering what are the major differences between playing cash games and tournaments.

I may be wrong (and that's where you people are useful) but here's how I see it:

- I should try to loosen up and limp to see the flop when the blinds are cheap (in the beggining) and tighten up postflop.

- I have to be aggressive when I sense weakness in my opponents or have a good read on them 'cause I can't wait for the ultimate nut all night (does that make sense?)

Well that's all I can think of in terms of variation between cash games/tournaments. So please help me in a constructive way 'cause you have more experience than I have that's for sure.