You can easily make a wooden bowl in the wild by cutting a thick tree root to the desired size and placing hot coals or embers on top of it. Give it a while, then simply dig out the charred bits of wood.
You can make a more effective smoke signal by adding grass, green leaves, or moss. This should create a highly visible white smoke.
If you by some chance happen into some quicksand, don't struggle. Simply spread your arms and legs and slowly roll onto your back. Salt water has a higher specific gravity than water, which is why it's easier to float on it. Quicksand is even denser; so if you relax, you should float right to the top.
If you know you're heading into an area with quicksand, carry a long pole. This can be used for testing the ground ahead of you, as well as an impromptu flotation device. Position the pole under your hips at a right angle to your spine.
If there is a chemical spill in your area, the best thing to do (unless otherwise advised by authorities) is to stay indoors. Close all doors and windows, place moist towels around the windows and doors to act as an air seal, and fill all your sinks and your bathtub with water. (If you have a gas mask or two in your SHTF bag, all the better

)
You can administer the Heimlich maneuver on yourself if needed. Throw yourself against whatever's available (I.E. a table edge, counter, log, etc.) Target the area of the abdomen just below your ribs.
Perform the Heimlich maneuver on yourself
Aspirin is a derivative of willow bark; you can treat a headache in the wild by boiling a concoction with willow leaves and bark.
If, for whatever reason, you have to jump a long distance into a body of water, take a deep breath and jump feet first. Point your toes, place your hands to your sides (or around your head for protection if you're going over a waterfall or the like), and clench your buttocks. The sudden inrush of water from such a fall can rupture your colon.
And finally, a survival tip for everyone's bed friend should the collapse of society make it difficult to find a vet: You can treat chocolate poisoning in dogs by orally administering a hydrogen peroxide and water solution.
How to Detect and Treat Chocolate Poisoning in Dogs | eHow.com
(I suggest always take your friends to a vet when possible...I don't want to be responsible should anyone on the forum try to use this tip and lose a family member)
Oh, and car bombs are generally placed under the hood, inside hubcaps, or behind wheels. If you ever feel like you need to check...
Must we have to leave it at fifty?

I've got more, I just don't want to hog the thread.
