Most stuff has been said but heres a few:If your harvester ever goes into melee range with the enemy (as it does in some maps) load it up with C4 and let it take out a few enemies with it.
If you find a couple of hotwires/engies backing up some tanks, quickly buy a buggy/hummvee and run them over in a kamikazee attack.
If a flame tank has reached your base - respawn as an engineer and quickly C4 it before going to repair.
If your in a stealth tank - always circle a GDI vehicle and ram it from behind with missles. It takes out ANY vehicle caught alone.
[ March 24, 2002: Message edited by: WRAITH ]
[ March 24, 2002: Message edited by: WRAITH ]