The Mental-list
Just like every other sport, paintball has a large mental element. Good paintball players use this to their advantage, and win games off the field as well as on. It's easiest to let a team beat itself, a critical component of pulling off an upset or making any competition easy. Some great tips on psyching out the enemy:

Be confidant- Know you're going to win. Yoda's got it right, there is no try, do or do not. Pep in your step and thinking clearly allows you to grasp a win, and to play correctly, on time, every time.

Show up in clean matching jerseys- Looking like a team is important. Not only does it solitify your teammates, it makes you look organized (more on that below). It can even make a team look sponsored- and sponsored players are good, right? Pro teams have clean matching jerseys.

Be Organized- Being organized lets you concentrate on winning.

Have a Chant- Chants are unnerving to the other team. It also gets you hyped for the game and brings a focus. Chant just before the game starts, and watch the other team let doubt creep in. Just like banging swords on shields.

Have extra players at the event wearing your team stuff- Good players have fans! The cooler looking people the better.