Knowing how to move around a battlefield, and where to take cover, can be the difference between having a fun time, and having a bad time.
To start, sticking within shouting distance of your team lead is a must. No one likes hearding cats, so keep an eye on your battle buddy and your team lead while manuvering around the AO.
A big no no, skylining is the act of walking on top of a terrain feature such as a ridge or hill, allowing the enemy to pick you out aginst the sky. It should be avoided whenever possible.