How does one teach oneself karate?

You really can't teach yourself martial arts effectively. For some of you that say you can't teach yourself martial arts, look up Rich Franklin. He learned submission fighting from instructional videos. Anyways, the best you could do is watch some videos and read books. It's nearly impossible to effectively teach yourself martial arts well enough to use in a real life fight scenario. Heck, it's hard to learn martial arts in a formal dojo and use it in a real life situation. It would be better to try and find a dojo.