Browntown,
I have the same problem and I've been quilting for 10 years.
I start something and if it doesn't go right, I put it aside until I can do it correctly. I don't want to ruin any fabric, as I buy most of my fabric in my LQS. I have a quilt helper, also. She likes to watch me while I sew. Shw helps me with Sudoku etc., also.
I still want to make about 50% of the quilts that I see. It's just that I don't have enough time to do it all. Eiltocq.