Sports tryout tips? please?

I have tryouts for my high school badminton team in a little over a month. You don't have to know anything about badminton to answer my question though. I am just looking for some good tips for how to train for tryouts and what I can do at tryouts to make sure I make it. I played last year on the Freshman team but this year only 6 out of the 18 sophmores will make it. Please give me some tips that have helped you make a team :) thanks