|We all know that sewing when you're tired is a bad idea. But most of us do it, right? To prevent some of those silly mistakes, I sometimes use coloured pencils to highlight the 'good side' of the fabric on the pattern instruction sheet.
For example, in my sewing machine guidebook, they've done a nice diagram under the heading blind hem stitch. I coloured the right side of the fabric on the picture bright green. It is amazing how much this helps when you're sleepy.
If your pattern is puzzle-like it might be a good idea to colour your fabric with the same colour, but in a tailors chalk.