Step 1:

Jump on the ramp!

Step 2:

Hold the key corresponding to the side of the ramp you are on!

(If on the right of the ramp, hold A. If on the left of the ramp, hold D)

Step 3:

Build momentum by sticking to the ramp! (You can follow a curved path to build even more momentum)

Step 4:

Launch off the ramp at a good angle.

Step 5:

Guide yourself to the next ramp and repeat!