Thirst is a movie about four people who get stranded in the desert and have to find their way out. Although predictable, it make you think about what you might do in that situation.
Drinking your own urine is a good way to sustain your hydration. I’m not sure if blood contains enough water to be helpful. Maybe. Have to do some research on that.
Don’t throw away a perfectly good dead snake. It’s good food!
Always carry a Personal Locator Beacon (PLB). They are a little expensive but surely worth it if you are about to die in the middle of some wilderness. Here’s one that could save your life.