All fun and useful skills. Thanks for posting.
Survival and enduring is regional. From the Texas angle I'd add....
1. Find water. You can't boil it if you don't have it and I'd put it way up on that list. Solar stills are nice but really slow. Learn what plants carry water, topography likely to have water sources or moisture below the surface, if not flowing/standing water. Learn to filter it with what you have, assuming no fire or containers.
2. Ditch toilet paper from the get go. I don't hike/camp with it. Learn what 2/3rds of the rest of the world does, who have never seen TP.
3. Learn the day and nighttime sky.
4. learn signaling, mirrors, smoke fires, signs, some morse code.
5. learn to trap and fish with minimal equipment, including no equipment at all.