Kyle Chin explains important aspects of the toeside predrift: lines, stance/body position, weight distribution, slide initiation/modulation, hookup, and avoiding common mistakes.
Please note that sliding style often varies from rider to rider. This is not the only way to execute a toeside predrift, but it is the most common (and easiest to learn) form.
Setup: Comet Voodoo (chopped), Paris 180s, 80a 4 Presidents
Filmed: Adam Colton
Edited: Kyle Chin
For tips on heelside predrifts, check out "Pre Active Pre Drifter":
http://www.youtube.com/watch?v=noNasLIbTqk