Make or buy a first-aid kit to carry with you. Include at least the minimum first-aid supplies, such as gauze, adhesive bandages, antibiotics and pain medication. Include special medications for those who have conditions such as allergies to bee stings or prescription medicines they must carry. Add lip balm, sunscreen and a pair of strong sunglasses to the kit. Pack anti-diarrhea tablets in case you become ill. They prevent dehydration.
Pack a multipurpose knife such as a Swiss Army knife. It should be strong enough to cut through thick ropes and small branches but small enough to carry. Check that it has necessary tools attached, including tweezers and a pair of scissors.
Include a space blanket and a thick tarp if possible. These can be used for warmth and shelter. Pack duct tape for patching holes, and 50 feet of 550 parachute cord. According to survivaltopics.com, this is the best cord to use because of its strength.
Carry a steel drinking cup and a method for purifying water such as purification tablets or a water purifying straw.
Pack a small LED flashlight and a mirror for signaling others if you are lost, and also for examining any wounds that are in hard-to-see areas. A small, loud whistle draws attention as well.
Include a small lighter, strike-anywhere matches and a magnesium fire starter. This gives you multiple options for making a fire, regardless of weather conditions.
Include snack foods such as granola bars, and fishing line with six or seven hooks. Carry safety pins for fixing tears in clothing or the tent and for using as makeshift fishing hooks. Stash emergency money in a waterproof pouch to buy food if you stumble upon a town and are waiting for help.
Pack a compass for direction, a map of the area, strong needles for sewing and heavy upholstery thread. Use these to fix a tent or a wound if needed.
Print out a good survival guide and have it laminated so it is waterproof. Research survival techniques before you leave on your trip.
Pack everything into the smallest waterproof pack or bag you can fit it into.