To Add to @DuckKnuckle's post.
- Press "v" to zero sniper rifle scopes (set the scope distance to counter bullet-drop)
- Spot all the time.
- Play Rush at first. It has a clear objective and more easily promotes team work.
- Use destruction. If they're camping up a building, drop it on them.
- Be a team player. Drop meds and ammo, when playing Assault and Support, repair vehicles as an engineer.
- Balance your squad. Don't be a sniper among 4 other snipers. If you notice many assault players go support or engineer.
- Double Team Tanks. Taking on a vehicle solo is maddness, always make sure you've got other engineers backing you up unless you deploy mines.
- Spot everything.
- try to never solo a vehicle, a decent gunner is a good assist, even a crappy one is better than none.
- Get the feel of the maps and select you loadout accordingly. No point in ranging it out in Locker and running around CQB on Silk.
- Spot even if there is nothing there!
- Assault is the core class, build them well and you'll prosper!
- Don't die, ever. You staying alive is more important than getting a camper tags.
- If a teamy is going to die because you want to take a enemies tags, rather shoot that enemy, please.
- Spot all the things!
- Have fun, it is a game after all






