This one has worked well for me, speeding my progress greatly. Just stare into the center of it, view a connection between the center and your third eye, the center is your third eye. view the sigil laid around your third eye. Do not force it, just let it happen. (IMG:style_emoticons/default/wizard.gif)
The image below is the low quality version, follow the link for the Sigil itself. The LQ version is not meant to be viewed, view the one in the link below instead, it is optimised for viewing.