In reply to Donnie: I have an avalanche transceiver, probe and shovel which I often use when off piste snowboarding, but not climbing; only because I don't want to carry even more gear up the hill! Also, it is easier to make an assessment of the snow pack on a walk than flying down a mountainside on skis etc.
The important thing to note is snowpack stability can have significant spatial variability.
The only way to 100% avoid avalanches is not to go out on the snow. With a fair understanding of the snow pack your risk of getting affected can be significantly but not completely reduced. Even equipped with avalanche forecasts folk still go out climbing and skiing in what can be very risky conditions - they may employ avalanche safety gear to reduce this risk.
The book One in a Million is excellent and is a good read.
The very basics of avalanches are...
Three types
1. Powder avalanche: Not so common in Scotland as powder snow never happens often enough
More common in the Alps. Most likely 24hrs after snowfall - longer if cold conditions persist. May happen spontaneously, normally from a point source. Biggest danger of these are their unpredictable nature and the speed and distance at which they travel. If you don't want to get caught in these leave about 24hr after significant snowfall before heading out - try telling a skier that!
2. Spring snow avalanche: These tend to be full pack. During spring temps, water appears under the snowpack, which decreases stability especially if overlying grass or rock slabs - the classic case in Scotland being the epic Coire an Lochain slab. As the snow pack ripples and cracks normally long before the avalanche happens, you are unlikely to get caught if you heed the snow's warnings. If you do get caught in these heavy full pack avalanches you are in serious trouble, probably not needing rescuing!
3. The most important for the Scottish climber is the wind slab avalanche. This is caused by snow falling in windy conditions and snow being moved by wind. The result is an often dull and 'hard' snow that often collects in lee side gullies/below cornices but can be on any face; typically localised. Wind slabs are also identifiable, but the stability of slabs can be tricky to assess, experience on snow helps here. Related to this are cornice collapses happening in the same conditions due to excessive build up, or in warmer temps as for spring avalanches when cornices also collapse.
Typically:
Snow accumulation is limited on very steep slopes and snow less able to slide on more shallow slopes; the worst slope angles being around 35-38%
Snowpack stability changes significantly both temporally and spatially - assess constantly.
The snow pack and its stability are a fascinating subject once you know a little about it! Understanding your environment is the best way to reduce your risks and enjoy it.