a few links

http://en.wikipedia.org/wiki/Sigil_(magic)
http://www.steliart.com/angelology_7_sigils.html

rose cross sigil method
http://www.angelfire.com/ab6/imuhtuk/gdmans/sigils/sigils.htm
http://www.wisdomsdoor.com/wb/hwb-sigil.shtml

"Modern Grimoire Magick" links with voodoo
http://jwmt.org/v1n10/modern.html

occult instructions
http://www.psychic101.com/sigil-magick.html
http://www.angelfire.com/realm2/amethystbt/divsigilmagick.html