One of the first magical techniques I ever learned was sigils. Although I did not put them into much use at the time, years later they became a frequently-practiced technique for a while.
Gordon over at Rune Soup has posted an excellent article on this technique, that I wanted to share, in case my readers don't already read his posts as well. The post itself is chock full of information, and on top of that links to all kinds of other sources of information to flesh out what is there.
If you have not read it yet, go check it out: Sigils Reboot
It has definitely reignited my interest in sigils. :)