Throw Weapon - Little note. Some people don't use the "throw weapon" key. Throwing your weapon is crucial when playing CTF. Especially since a shock combo costs 5 ammo. If you have 3 rounds left on your shock rifle; drop it, and then pick up a new shock rifle with 20 rounds.
Weapons - Practice all weapons! Dedicate an entire day to playing with just 1 weapon! When you learn to play well with all the weapons, it will make a huge difference!