Ned in the comments reminded me that a bike really should be on this list. Of course, I don’t really need to say, but a good mountain bike is incredibly useful in a SHTF situation where fuel is hard to get. Ned mentioned that it’d be a good idea to couple the bike with a carrying rack on the front or back, and if you can, an electric generator. I think that’s a pretty damn great idea; only problem is I haven’t managed to find any electric generators for bikes that actually have good reviews. If you know of one, please recommend one down in the comments section.
Personal defense items – such as rifles and heavy firearms – are going to be increasinly hard to manage the farther you move from steady supplies.  Ironically, it’s firearms that help acquire more food, provide personal protection, and deter others from attacking.  In a SHTF scenario, heavy armament is only good within fortified areas.  If you want to stay highly mobile, switch down to a .22LR polymer rifle such as the Savage survival rifle or similar.  Lightweight, collapsible, and perfect for hunting game.  Loaded with subsonic rounds, it can also be a lot more efficient than heading off a target with a loud 30-06.

For the Soon to Be Ready for Anything Prepper

The Ultimate List of the 8 Most Important Surviving Skills that will Make the Difference between Life and Death during a Crisis