there are a number of books available about bears, bear attacks and strategies to avoid bear conflicts.
Bear attacks, their causes and avoidance by Stephen Herrero is one that's been around for years. Herrero was a Professor of Animal Behaviour and a recognized authority on bear behaviour - particularly grizzlies.
There is also a lot of good info available from a variety of websites. Basically use common sense. Avoid traveling alone in bear country and not at times bears are most active - dusk, night and at dawn. Make noise in the bush and be aware what's going on around you. Purpose made capiscum bear repellent spray is your best defence. If traveling in a group each person should have some. Make sure it can be accessed in a second or two.