From time to time I head out on my own to train and have found self-belaying a great technique but it requires a bit of thought to do it safely. For those of you who are interested in being able to go climbing on your own check out this article posted on www.climbing.com
http://www.climbing.com/skill/solo-toproping/
This is a great intro to the subject. Please note that a good level of advanced rope work/anchor building is required. This isn’t for novice climbers!
For another article on the subject please see:
http://www.petzl.com/us/outdoor/product-experience/self-belay-solo-climbing/introduction-us