George S. Ledyard
I am really serious about this... If you live in an dangerous area in which you expect to have to defend yourself, or you hang around in bars with men consuming alcohol with some frequency, or you have a stalker problem, or any serious violent threat to your physical well being, do some other training.
...and some other things besides training, too. There are many options for dealing with threats, including some very simple, direct, common-sense things like (for example, if you're being stalked) making sure that the building security where you work and live is aware of the problem. If your well-being is in danger, it's probably wise to employ more than just one option in dealing with it, or at least take multiple options into consideration.