Know more, carry less, but be prepared with the kit, it is more comfortable. Always practice, and try to learn new ways to overcome problems. Practice many ways to do everything, like purify water, build shelter, start fires, etc. When it happens, you may not have everything you want to have, regardless of how prepared you are or how well equipped your vehicle or house is. You may have to improvise with what you can find. Use every opportunity to learn a new technique or practice old ones. Teaching is a great way to enhance your own skills (if you have someone who will sit through it).