From the wired.com article:
Many outdoor enthusiasts love to agonize over what belongs in their survival kit. Here are the supplies that we think belong in a small pack for quick trips into the wilderness. Of course, a GPS unit and a satellite phone would be handy, but this collection is meant to be a cheap backup for times when those items are damaged or inaccessible.
10. High-Calorie Protein Bars
Hunting and fishing may be more trouble than they are worth. You may burn more calories in search of prey than you would gain from eating their flesh. Save yourself from some agony by packing a few snacks.
Flashlights can be seen by search and rescue teams from a great distance. They are a great way to attract attention to yourself and could come in handy if you have trouble making a fire.
When you are lost in the woods, signaling for help should be a high priority. Blowing a whistle periodically requires much less energy than yelling and the high pitch sound may travel further.
7. Backpacker Hammock
In extremely hot or cold environments, protecting yourself from the elements is half the battle. You can always disassemble it to construct a more elaborate shelter.
6. Water Purification Supplies
Drinking brackish water can do more harm than good. By properly filtering and decontaminating your beverages, you can avoid getting in even more trouble.
Read the rest of the list here.