How to vector a sketch from A to Z (part 1)

I felt like trying to make a tutorial, so here you go. :<

Part 2

Useful links :

MLP-VectorClub quality guide : darcowalways.deviantart.com/ar…
's tutorials : misteraibo.deviantart.com/gall…
's Unicorn glow tutorial : zutheskunk.deviantart.com/art/…

Color guide : i6.minus.com/iurGZ8Q9WHQVp.png

Cutie marks' gallery : mlp-vectorclub.deviantart.com/…
Yes I didn't mention it in the tutorial, but I prefer using the MLP-VectorClub's cutie marks (well except in this example 'cause the cutie mark was really well drawn) rather than tracing the sketch. It's both faster and more accurate.

Gradient and clipping video complement
Taper video complement