Abusing a glitch perhaps, but the Auto-Pilot can be very useful.

If for example, you are racing on Altima and you fly through a wall, you can use the AP to drive your craft straight out, rather than wait for the wuss wagon. Another useful tip is to use the AP just before you hit a wall and ruin your lead because it will always save your ass.

Not much of a tip but I noticed there weren't many here...