sapienza
I've always hoped to come across this book in a second hand shop or on ebay for a bargain, but never have. I once came up with my own layout/set-up for tarot after many years of study and it was the single most useful thing that I've ever done with the cards. Using other people's systems is a good start but I think when you come up with your own you really start to 'get' tarot on a much deeper level. Well, that's how it worked for me anyway. 
