Backrolling - Although effective in botting, it is frowned upon for PvP. Backrolling involves holding two strafes, one of the being backwards, and one roll key. This makes you difficult to hit, but keep in mind you won't hit your enemy much either. There are much more effective and creative ways to fight than backrolling.
Jousting - Best applied when using Gauss Cannons, jousting consists of leaving FA on and making passes at your opponent. Gauss is most effective when jousting because of its large projectile size, good auto aim, and high damage per shot. Though heavier, Plasma Devastators are also effective at this tactic due to the same advantages.
Spamming - Not to be confused with simply using missiles. Spamming involves emptying most of the ammo from a missile tube at one target. This is another frowned upon tactic in PvP. Not only is it very annoying, but when facing an experienced pilot it is very ineffective as well. The best use of missiles is through careful aim and timing your shots correctly.