Base used in tutorials are from Xandorra
Extra Advice: Best Done on x2 zoom or x6 zoom. Only when shading do you use Max Zoom
The Red coloured lines are the outline of folds. While the blue colour is a suggestion on how to shade the fold

This fold is usually used for shawls or off-shoulder top.
Example Of Use:

This is more for a wrap around skirt. This fold can be made into a long skirt. A Saree maybe...
Example Of Use:

This is common for Mini-skirts...or any short skirts. The purple-colour addition is Important. This give your skirt a 3D look.
Example Of Use:

A simple long skirt. The blue shading is just a suggestion, there are many other ways you can shade it.
Example Of Use:

For Long Drapey Skirts...
Example Of Use:

Special Skirts...To make that Sexy outfit ^^
Example Of Use: