Recently discovered: transparent highlighter tape (made by Lee Products), available in several colors, is a foolproof placeholder for complex knitting patterns. I had tried Post-It Notes, but the glue wore off quickly. Highlighter tape, billed as "a removable alternative to permanent highlighter pens" (indeed), just sticks and sticks, thereby preventing tantrums when I lose my place in a 24-line pattern sequence for the zillionth time. I love it!
This was a check-out tantalizer at The Island Yarn Company in Waltham, MA (see previous post). It's probably also available at office supply stores, or in the stationery sections of Big Box emporia.