I rerun vimtutor from time to time, because I still don't remember every trick from it. I've recently tried to read the whole embedded "introductory documentation" on a train, learned a lot, but probably need to do it again. Setting every option in the .vimrc seems a nice exercise, will need to do it some time! I like to nuke my config from time to time anyway. (My experience with Vim is about 14 years I think.)