Below are my favorite free online learning videos covering some of the basic skills of snowmobiling in the mountains (mountain sledding). For more learning resources on other topics check out the free learning resources page.
Getting Unstuck-Getting stuck is part of experience, with good technique you can get unstuck pretty quick.
Off Trail Riding Concepts–Riding off trail is very different than on a trail. These videos cover fundamental skills including: counter steering, throttle blip, use of brakes, and body position.
Overview
Throttle blip
Brakes
Side hilling
Basic Riding Skills
Momentum
Down hill track basic
Neutral and Wrong Foot Forward
Beyond the Basics
Strategy for steeper terrain
Managing steep downhills
Riding through trees
Firm snow
Down Hill U-turn (180) to go back up
Turning out to go back down
Basic Maintenance
Chain tension
Adjust belt tension
Belt tension theory