Another thing, and this can be very important.
Dos and Don'ts of shooting empty vehicles
DO NOT, EVER shoot an enemy vehicle that has not been used to the point where it is destroyed, after about 15 seconds, IT WILL REGENERATE. The trick is to shoot them until you see flames, and then drive away, this way they're stuck with worthless metal.
DO NOT SHOOT at a used enemy vehicle. If they leave the vehicle, and it's very very hurt, why destroy it? Get in, then get out, and link gun it back to life, weeee free vehicle(you must get in first, otherwise it will just destroy it) You can really help out the soldiers this way.
Also, make note as to WHAT Nodes you're attacking.
Here you can see a very professional graphic of what some of the node layouts are like.
Take note to nodes E, C, and B. All are under attack, and you just died, you spawned at D, what to do? Well, you could probably walk to E and defend, and get a few kills in, or maybe C if you have a vehicle. Hey, there's a Manta, I'll just stop at A, and attack. Never.
Go to Node B. First of all, EVERYBODY else is going to be at the center nodes, either attacking or defending, it's very doubtful that a red soldier is just going to be waiting for an attack, which leaves this node ridiculously vulnerable. Secondly, think about it. The second Node B is destroyed, red is just standing there with their thumb up there butts. Set up the blue node as quickly as you can, and prepare to die, but you singlehandedly just turned the game around. Also, sometimes, like in these situations, it might actually not be a good idea to kill. Here's why.
Let's say you are at node C, defending, while someone is already attacking B. If you kill the red person, they're now very close to your savior at node B, not good, there's going to be vehicles like crazy waiting to be manned. If you just run away, then the opponent is going to have to search for a busted-*** vehicle, or, if he's crazy/smart(both?) he'll kill himself with an Avril, allowing him to get to the heart node faster. A lot of this is judgement, but a lot of this is just plain common sense. Why keep wiping up the water when you can just turn off the faucet.
***SAD*** I've never played an First-person shooter really until this game, I need a life.