Always make sure you have the proper training, experience and qualifications for the sport.
Make sure that you take a properly trained, experience and qualified person for the sport with you.
Check that you have the correct equipment and that it is in excellent working order.
Make sure that a responsible person knows where you are going, what you will be doing and the dates and times.
Know the safe way to use all equipment.
Make sure you have a safety routine in case of emergency.
Take all safety equipment and first aid items with you.
Check electrical devices and any battery's.
Check the weather for the time of your sport. Also check the weather before and expected weather after your sport. (Rain, snow etc. before could lead to flooding.)
Take the correct clothing for the sport.
Join a club.