I was watching a documentary on youtube, and at one point it explained how to make a sigil.
http://www.youtube.com/watch?v=SfAhA...elated&search=
(See 1 minute 13 seconds into the video) And don't let the title fool you, it's a facinating documentary.

Basically it's as follows.
1. Write your desire.
2. Remove all vowels.
3. Remove all repeating consonants.
4. Rearrange the remaining letters into an easily remembered symbol.

For kicks I decide to make a lucid sigil. I started with Lucid Dreaming as my desire, then just shortened it to "Lucid" for simplicities sake.

Lucid gave me the letters L, C, D.

and I arranged them like this...

Not quite as fancy shmancy as the one in the video, and it didn't do squat for my lucidity last night. But I figure making that was as good as doing a reality check.