Mao (left) of Sparkly Belly offers website offers very prettily presented how-tos for various costume pieces and decorations, both photo/text instructions on the page and video tutorials like the one below. It shows you the easy steps to cut and sew a short drapey overskirt, the type that’s popular with Tribal dancers.
Thanks very much, Mao! Illustrated below are a variety of other layered pant/overskirt looks for Tribal & fusion dancers, from Tribal Vibes for Bellydancers.
My own tips are published here: Costuming Tips & Advice