I have a friend who does these little drawings, well not so little. She buys the fabric she wants to use plus extra. With the extra she hand draws the blocks she plans to use and then cuts and pastes the pieces into different areas of the block until she finds the layout she really likes and then that's the one she uses. She put a month into doing this with a quilt that she is now currently working on and it will be stunning if/when she ever finishes it. She tends to have a lot of UFO's for some reason. She's a perfectionist and if the least little thing goes wrong, that's the end of the project. The shame is that she'll get them half way or further along and then put it away but she loves working on it while she works on it. In the few years I've known her, she has started many projects but never completed one; not a one.