Do martial arts training until you get the falling more or less right. While this might be helpful against muggers the main benefit is the reduced probability of injury in various unfortunate situation.
As someone with ~3 years of aikido experience, I second this.
This thread is for asking any questions that might seem obvious, tangential, silly or what-have-you. Don't be shy, everyone has holes in their knowledge, though the fewer and the smaller we can make them, the better.
Please be respectful of other people's admitting ignorance and don't mock them for it, as they're doing a noble thing.
To any future monthly posters of SQ threads, please remember to add the "stupid_questions" tag.