Knowledge, experience, and attitude are the most valuable assets you can have when it comes to being self sufficient. However, owning some equipment or stocking up on some supplies can speed up the process and makes things a lot more enjoyable for you.
This list is a live document and I will make additions from time to time.
Here are some good lists of equipment, tools, and other supplies that I have found online:
Hand Tools and Homestead Gear
Basic Tool Kit
Intermediate Information on a Basic Tool Kit Part 1 / Tool Kit Part 2
Below is a list of skills the help to promote self sufficiency. This isn’t a post for reading, but it is more of notes that I make as I think of things, hear a suggestion on a podcast, or read of something interesting on the web.
This list will be ongoing and I will add to it regularly.
Of interest are occupational skills, survival & bushcraft skills, homesteading skills, etc.