Fighter: Find the closest fight and kill everyone. Dont HO and if you see LOW bombers kill them first (but do not ignore the fighters that might kill you). Points are most important and points come from the damage you do to enemy planes. Shoot accurate and leave nothing of their plane except the pilot and stick and then shoot the pilot.
Bomber: Climb to heaven and bomb towns. Ignore the strats. Blame HTC I didnt make it like that.
Attack: Same as fighter except every now and then you should shoot buildings with a LOT of ammo (dont miss). Every tenth sortie or so fly a flock of Ju88s and bomb a Vbase down and guns too and then bail and take a goon or m3 to capture it.
Vehicles: DO NOT spawn camp. Your kills per time will be terrible if you do and you will get bombed. Defend fields on the move (dont camp) and keep them guessing where you are. Once each tour you need to use the rockets on the PT or the 251 tracked vehicle to destroy some buildings. Try not to miss.
Fear nothing. Always press your attack and know that the guy you are fighting is sorry he ever saw you. Let everyone know that if it is YOUR choice to engage THEY WILL DIE! If in the unlikely event you are shot down or killed just shake it off and realize it was a random bullet and not the other guy pointing his mouse at you. If you are out of ammo do not go defensive... scare the pudding out of them and watch them auger!
Do not defend a base from a single (lone) con. Do not up a wirbel to kill a single (lone) porker. Do not climb to heaven to shoot bombers. Do not resupply in vehicle or goon.
When you can do all of the 'DO NOTs' and still rank in the top ten you will realize just how terrible everyone else really is.
Next time take Uptowns advice.

You will be called a picker and they will say you fight timidly. Ignore them as the dweebs/noobs they are. None of them have a clue.