
Just few days ago I had an idea of having a 'blind' yoga class for inner senses stimulation and great feel of your energy in asanas. (Remember those fancy blind restaurants in Paris, Moscow, NYC?)
And voilà, similar class already exists and they say it's great for promoting the health of the 6th chakra (=3rd eye)... Really want to try it one day!
Details about the Ajna chakra (6th out of seven chakras) and how to awaken it read here:
YJ - Asanas for the Chakra System
I'd add also Seated Yoga Mudra pose to the last paragraph.
Bookmarking this scientific article too:
http://www.allgoodthings.com/yoga/chakra/chakra6_3.html