I'll add a few basics here. Assuming you're playing single table tournaments vs multi-table of course. On a side note, while I do take stabs at major multi table tourneys, I tend to stick to singles as there's less variance and the games don't last for hours.
In all honestly, the game doesn't really start until the blinds hit 100. That's why you'll read most people playing very tight until then. You have no idea how easy it is to make up chips once you hit this level. And it tends to get rid of the very loose players. Remember to play from late position and play with strength. No limping, no min raises. Start with 3xBB, then reduce it down to 2.5 BB once the blinds hit 150 or so. The more people you're up against in a hand, the harder it is to win.
The only hands I play early in a tourney are high pocket pairs, A,10+ and even then a lot of time I need to be at least mid position or later. If I'm CO or the button, then I'll also add suited connectors to my range.
That said, trying to limp in with a low pocket pair is fine, just be ready to dump them if you don't get the 3 of kind. Also don't bluff!!! Save bluffing
until you get more experience. And even then it needs to be saved until later in the game.
Once you get further in, then open your range up.
Ok...this was a bit of rambling...but I think it'll get you going.