Don't attempt anything that stands a good chance of causing injury to yourself when you're out alone and a long way from help. It's no time to discover that you should have paid more attention in "Common Sense" class.

"Gee, that's a cool big pile of jumbled rocks that it might be fun to try to climb." NOT

"Wow, it's all downhill back to the truck now. I bet I could dash back through that boulder-filled creekbed and make it back in half the time." NOT

"Cool, a big western pacific rattlesnake right on the trail in front of me. I bet I could get a great pic on my cellphone if I just snuck up close." NOT

"Hey, I can just slide right down this bank next to the road here and explore the bottom of that canyon without bothering to take my water, PLB and PSK." NOT