Save your bazooka shots for tanks; if you pick up a bazooka, odds are 
there's a tank lurking nearby. 

Use the flamethrower for close combat in multiplayer situations in which 
you and your enemy are circling each other; fire up the flamethrower and 
keep spinning until he runs away. 

Fire grenades and mortars behind obstacles to flush out enemies who have 
taken cover. This is particularly useful because you can do this while 
hiding behind an obstacle yourself.