I use a paste up sheet to keep things organized. It gives me one less thing to have to remember and frees my mind up for pleasant thoughts.
I just make my own by either roughly drawing the block or photocopying the pattern and then taking snippets of the fabric and either taping or gluing them on. I have even been known to take them to the fabric shop when buying the fabric and right there in the shop once the fabric is cut making my paste up sheet. What seemed so logical in the fabric shop isn't always so easy to recall when I get home.