It is important to know how to use everything in your first-aid kit beforehand. You won't have time in the middle of an emergency to read an instruction manual. Before you go, learn about any possible hazards at your destination, such as poisonous plants, snakes and insects. Ask local officials or park rangers what special gear or clothing might be needed. Locate the road and public phone closest to your campsite or trail, so you know where to summon help if it is needed.
Some organizations offer wilderness first-aid courses targeted to outdoors enthusiasts.
Be sure to practice what you learn and share it with others in your party. Good first-aid kits are available in a wide range of prices, and specialty kits are available for mountain bikers, canoeists and others.