Wear a helmet, proper shoes and clothes that don't get hoisted mid-air (sarees are out).
If you are going for a solo flight, insist on a radio set.
Check the wind and weather conditions. Clouds, low visibility and violent winds are a strict no.
It's a no-go sport for heart patients, and alchohol and drugs are to be totally avoided before going on a sortie.
Skiing
Check your instructor's licence.
Make sure the skis fit you well, they shouldn't be too tight or too loose.
Never ski without knee and ankle guards,
helmet, shades and snow gloves.
Never begin on a slope that's too steep, or heavily tree-lined or is prone to avalanches.
Rock Climbing
Check the equipment: the harness and carabinier should be in good condition and less than two years old. No slippery shoes or loose helmets.
Rappelling
All metallic equipment (hammers, screws, pitons and choes etc) need to be in good condition.
You shouldn't be suffering from any respiratory problems.
Rafting
Rafts should be self-bailing, multi-chambered and made of tear-resistant nylon-based hypalon.
There has to be fully equipped first-aid and repair kit (with repair bags and fliplines) on board during a trip.
A guide should have had at least 30 raft runs guiding on his own before he is cleared.
The helmets should be light, well-padded with chin straps. The life-jackets should have snug fits and proper adjustable straps. Buoyancy should be good. For example: 22 pound buoyancy for a person weighing 70 kgs.
Ensure a detailed safety briefing prior to a trip.