I've made a few, but never used a pattern. I either plan it out on graph paper or on the computer. Figure out how many prints I want to use, then how many squares of each I need.
I thought in the past I'd seen a book, maybe a Quilt in a Day with that pattern. Some of them strip piece, then cut into squares. I just started with squares.
Here's a couple of links:
http://www.ehow.com/how_2343553_trip...rld-quilt.html
http://www.thriftyfun.com/tf497186.tip.html
http://www.craftconn.com/Main.asp?Ta...roductID=24346