Usage of your radar is normally a good source for finding enemy craft.
Looking in the distance of the battle screen is a more successful method,
as you have a longer range here.
Catching enemy craft by surprise is a good way of getting the upper hand
on them.
Smaller enemies can be destroyed, by being run over at high speed. Using
this method will save using up missiles unnecessarily.
Usage of mines (especially indoors) is a good way of destroying any
pursuing enemy craft. They will continue along your path until they meet a
bitter end by maneuvering over your mines.