there is a way to beat all types of games, except maybe flip games just gotta hope you get better cards that hold or that you get lucky.
50bb to start a tourney sounds like its very much a turbo.....lots of info you could provide though. Is it a freezeout or a rebuy, what are the speed of the blinds, is there an addon etc etc.
In general you will find the answer to this question in various other threads posing a similar question, basically play a good TAG approach if its in deed as turbo as it sounds it will be then hope to snag some good hands and post before you get too short. Play to table dynamics, if everyone is playing tight then you wanna open your range some to steal more, always be aware of your position. if its a loose table then tight is right and punish limpers when you get the goods.
it sounds like you have played before as well so you always give more input on the game itself what the players are like etc etc. A question with few details cannot be given a very specific response and as with most poker it depends like i said on dynamics (other players skill levels, how they perceive you, lose/tight etc etc).