1- let go of some/all of you equipment. Your trying to save yourself not your gear. Let go of your gear, gear tends to be heavy and could cause more problems. You want to be as light as possible.
2- Hold onto something sturdy/ put. Hold on to a tree and wrap your hands around it. (however keep in mind that avalanches do pull trees and rocks apart, this is most useful for a small avalanche)
3- If you do get buried in snow build a little pocket to breath. This will help so you do not get suffocated.
hope it helps