Rory Miller’s advice to martial artists — at least those interested in actual self-defense — is to learn how attacks happen:
Too many people train like they are collecting tools. Mechanics don’t study tools, they study cars and what can go wrong with them. Doctors don’t take classes on Scalpel 101, they study diagnostics and anatomy. If you want to defend yourself, learn about violence. It is useless to have a thousand answers if you don’t know the question. Also, be prepared that your idea of who you are probably won’t survive a violent encounter.