Here are a few tricks that get you boosts
Flatspins are super easy.
All you have to do is drift while you are going off of a flat ramp.
If you don't then you won't do any cool tricks.
This trick gives you a huge boost
Barrel Rolls are probably easier to do then flatspins
All you have to do is go off of a curvy looking ramp
This trick also gives you a huge boost
These are some tricks that i use a lot