Double fighter (Galaga):
Shoot one of the green ships on the top row to turn it blue. When one of them 
dives alone, avoid its shots. Intentionally allow your fighter to be captured 
by its tractor beam. With your next ship, wait until the joined ships to 
dive. Shoot the alien while carefully avoiding your captured fighter. You 
will have a double fighter with twice the firepower. 

Keep Galaxians unarmed (Galaga):
In level 1, allow all the enemies to get into formation and note the bottom 
left bee. Kill all of the other enemies except for that bee. When just that 
bee remains, place your ship in the lower right corner. Allow him to fly 
around and attempt to attack your ship. After one pass with him not firing, 
allow him to pass again. If he is still not firing, shoot him during this 
second pass. This will take approximately 15 minutes. Doing this will disarm 
the enemies for the remainder of the game.

Quick start (Pole Position):
Shift to low until you reach about 160 kmh and shift to high. This results 
in a nice speed boost and if you have pole position, an instant lead.