Probably the best way is to be popular within the group or at least NOT unpopular. As a popular person, your manager will see you as sombody who gets along with everybody else. This is espeically important in a "Star Team" group where all members are performing brilliantly. The manager will look at the people who get along and rate them higher than the people who are a little different. The manager will grade down the 'unpopular' staff because they always seem to be in conflict or the naysayers or such.
The above was my personal experience. I learnt pretty quickly in my career that I didnt really "fit in". whilst I got the work done I always got lower gradings on these kinds of things.
I would like to say that its something you can change but often its not somethign you can conciously change. Its your personality. it's who you are. there is no real changing of that. The reality is probably that the only way you could improve your rateing is move to a department where there are people less popular than you.
Hmm. wow that sounds really dodgey, doesnt it! :) Excuse me, I have to go and put in a job application that's just come up on the companys internal job board.