|(see pic above)
"Jump" squares ( I don't know what else to call them), have been one of those techniques that has changed my sewing experience.
No more losing your thread or thread nests or jamming.
It's a trick I learned from a sample maker in the garment industry. You use a fabric square at the beginning of the seam, which has been sewn onto from the last time you sewed a seam, then "jump" off of it and onto your seam. Position the rest of your garment seams "choo-choo train"style so you are always jumping onto a seam immediately. For the last seam use the jump square. Leave the square under your machine needle for next time so you are set to go.
This really will change your sewing experience!
I have recently found that thick felt is wonderful to make a square from. I cut 2 squares for each machine I have, each is 2.5 inches.
You can use regular fabric folded in half but the felt is a single layer.