2) I don't care how good you are, wait your turn for choppers and jets.
You can see that they are waiting for their try, let them. 1st come first serve.
5 people waiting for one jet deserves a bomb run, refer to rule 1 if you have any questions.

3) Join a squad via CAPSLOCK, then fill it accordingly.
Best overall Squads from PRIMA Strategy Guide<--a must have, great for level tactics

Assault Squad
2 anti tank Target vehicles
2 assault Supressive fire for squad
1 medic
1 support
Role capture flags

Vehicle Squad
1 anti tank Be ready to dismount vehicle for rocket attack on enemy vehicle
1 assault Dismount to cover vehicle or use the vehicle weapon
2 engineers Vehicle drivers (they will repair each other)
1 medic
1 support

Defensive Squad
2 anti tank Rockets can travel far, so hide and cover access points
3 assault Infantry Defense
1 engineer Lay mines on access points to the defended flag

Recon Squad
1 sniper Both of you stay hidden as much as possible and call out troop movements
1 support Provide ammo and support for sniper

Anti Tank Squad
2 anti tank Rockets can go far
1 support Rearm and defend anti tank

Raiding Squad (attack command center, sats, and arty)
2-3 specops Fight behind enemy lines and get there as fast as possible.
After main objectives are complete c4 some main roads in their base or maybe the
command center again for that repair engineer. C4 on their jets and choppers is always a good call.
Request a supply drop near their base for more C4 charges.
If boating try parking under a bridge and letting your men plant some C4 under it.

One Man Army
The great hero that dies over and over till the team tickets are gone.

4) PageUp is the command for forgiving an accidental Teamkill , don't be a A-hole.
Deliberate TK's will be kicked.

5) If you don't like the game go play Duke Nukem Forever or your Atari, whine somewhere else.
THIS IS THE BEST GAME EVER CREATED DEPITE ITS FLAWS.