I like to break there tournament into segments. The early stages, middle stages, and late stages.

In the early stages, you are looking for high implied odds hands. I'm looking to playing A3s versus some AQ, because I'm interested in getting two pair against the player who doesn't know how to fold. You need to know who the fish are first tho. Like anyone playing too many hands, taking ridiculous lines with bluffs, playing passively, raising to more than 5x the bb, etc. If someone does something strange, odds are they will be doing more strange things. It's very easy to get frustrated or bored and try to play something you shouldn't, but early on, you should just fold your trouble hands. So early on is all about staying patient. If you don't get a chip up spot, you still have all tournament thereafter. Plus, if you're watching your opponents, you can play against their weaknesses (like if they are overvaluing top pair, etc.) And just look past a single street. And try to get max value while maintaining your stack.