Another great place to get plenty of air is in the Monkey Ball level called Pirates Ocean Monkey Target. It's the annoying one with all the hairpins when you return to the start/finish line.
Select Alex Kid (I find him to be the easiest to see the tricks on).
Turbo start by pressing and holding accelerate (RT) when the countdown is at 2.
Speed ahead of the field and hit all 5 boost plates on the downward ramp.
You'll have plenty of time to do the three tricks (press LT x 3 while airborne) and make the landing (that's the important part).
The achievement will pop as soon as you hit the ground in one piece.