Look for depositions of snow at the bottom of slopes that appear likely to slide. A deposition indicates that a slide has occurred recently. Listen as you go. Avoid slopes where these signs are evident. Ridges are often loaded with snow by persistent winds.
Snow loads build up on the leeward side, thus top-weighting the slope.
These areas are prone to slide. Build-up of large overhanging cornices provide the obvious sign. Avoid standing on top of the overhangs or skiing below the cornices. Take safe travel routes. If you must cross an area prone to avalanche, cross the area very high or very low.