Pot-Limit Holdem Tournament strategy

Hi,

I have played Limit and No-Limit tournaments but never Pot-Limit and am about to enter one for the first time.

What is the strategic difference between Pot and No-Limit?

What I need is help with what not to do.
Things that work in NL that would be bad for you in Pot Limit.

Do I play extra tight or try to see more flops?

Any advice is greatly appreciated.