Air Force: Delta Storm (Xbox)

General Gameplay Tips
Don't spend range to return to your Airbase if you've only used a few missles. It sucks to have to beat the little missions constantly.
Always use guns to shoot down fighters, more money is good.
When engaging with guns, use the cockpit window for the gun-sight.
When there's a missle coming, hit the afterburners and dive, that should shake them.
Be careful in small spaces - manueverability is not good.
For those of you who have played AFD for Dreamcast, be aware that this gameplay is more realistic.

Get More Planes
Beat any 2 levels in a row without returning to the air base to get more planes.

Double Money
Destroy any air targets with your guns instead of missiles and you will get double the money bonus at the end of the level.