The main health precautions you have to take before indulging in any activity is that you should avoid having alcohol and excess of food. It especially mandatory for scuba diving, skydiving, paragliding, snorkeling, beachside activities, desert safari, seaplane ride, helicopter ride etc. If you have sea sickness, then you can have Bonine or Benadryl. It will help you enjoy cruises and fishing in the middle of the sea easily. If you are for skydiving, then don’t do scuba diving 24 hours prior to it and vice versa because it makes pressure differences in your body.