I agree with a Peter. His meathods are sound very good. I mentioned in one of my earlier replies that at my dojo we do a lot of night time and blindfolded training. Some of it resemples a form of push hands but with an Aikido twist. Others are simple free sparring were we are blindfolded or simply close our eyes, the lights are turned of and the senior students simply move about the room either attaking use or simple invading our sphere of sensitivity. This help develope your general awareness of your suroundings. Wiether its Ki exstention or a form of sixth sense it develops quickly. A home version of this is to simpley move about your house with the lights of and your eyes closed. I strongly recomend you put anything breakable safly away before doing this though.
hope I was some help.