You mean seeing astral beings with your third eye or walking around and sensing your surroundings?
For you third eye, balancing your chakras, and there is various exercises you could do to strengthen your clairvoyant side. The simplist would probably be taking a deck of cards, hold each one up and try to sense the card. Start with the colour, then the suit, and eventually the whole card. Record your results.
If you meant blind folding yourself and walking around not bumping into things, its challenging but can be done. I've heard some people learning a type of echo location. Blind people use the sound and vibrations from a cane to 'see' where they are going. Personally I would love to be able to 'see' with my feet like Toph in Avatar, though I don't know how long or possible that would be.