There is no correct way to play a tournament, during which you will have to adapt to various situations, play with a few BBs, another BB many hours, the good thing is you have a wide knowledge about what situations you can get involved in a certain type of tournament, so you can have faster actions .... Always focus on the game, avoid losing attention with things outside the game. Reviewing tournaments is a good way to learn to improve the game, and it is easier to put the knowledge in practice, these are posted by our friend and others available on the internet.
The strategy to play mtt, is to have patience at the beginning of a tournament, you should not play many hands, the blinds are small so it is not worth risking chips. To advanced in a tournament you have to play aggressive and not be afraid of being eliminated, even if the blinds are bigger you have to increase the aggression, and take advantage of the position on the table and weak players.
Play aggressive, but remember that chips that you lose are worth more than chips you win. Especially near bubbles.
With a big stack, you can take more risks, if you have over 50bb... you can have a big range.
Short stack play is mostly shove, if under 20bb, you want to shove with premium hands 90% of the time