Get Peter Kummerfeldt's book "Surviving Wilderness Emergencies" and Cody Lundin's book "98.6: Keeping you Ass Alive" (His style is different, but the information is good). You may also consider the Boy Scout Wilderness Survival Merit Badge book and use the merit badge work sheet as an outline. It is basic, but if you have only 50 minutes it covers the critical points; and it agrees totally with the two books mentioned.