realskiers

Johnny, slowing down in powder to stop or change direction....2 entirely different things in pow...you need momentum in pow otherwise the depth and density of the pow will take control. You can mangage your speed with rounded turns or like Bush stated smear turns. Having a wider ski for this is very helpful....twin tips or rockers  make this much easier. Woods skiing is not for the faint of heart...it takes years of practice, control, and fearlessness to ski in there like BW does. Glades, much easier to maneuver in...but if you're just learing pow..stick to open trails or bowls.

What works for me:
Work the skis from a very centered stance...when turning..weighted 50/50 to 60/40 depending on where you are in the turn.
Feel you are more upright than you would be on a hard snow groomer.
Trust the uphill edge to be active in turn shape and speed management.
keep downhill big toe edge and up hill baby toe edge working all the time.
Keep the pole plants working and your hands where you can see them at all times.
Work both feet together because just working your downhill big toe edge will separate your skis quickly
Keep knees together so the skis work as a platform
Soft movements to the edges unless your slamming them sideways.
Stopping in pow...hockey stops work, pointing the tips up hill works...basically the same stuff as on groomers but softer.
Be patient with your turns..any over exagerated movements throw off your rhythm.

Finally...enjoy the pow...it's a real treat to ski once you find your comfort zone.

Best, g