6 max Tourney strategy help

I have just started playing in these tournaments that Pokerstars runs. Played in 4 made the money in 3. Played the $2.50, $5.50 and $11. What methods can be used to get to final tables. I realize they call these donkaments and luck is a huge factor. I feel I'm close but make bad decissions late in tourney's which knock me out.

Any help for a 6 max tournament fan.

i like to play in 6 max tournaments because you have less people to watch and more time to take advantage. i usually plat tight super aggressive the whole tournament. i have done well in the past and will keep it up