Hemostats have a few uses for sewing. Use them to unclog thread from your sewing machine. If you have a thick fabric that needs hand sewing, use hemostat forceps to pull the needle through. They can also be used as a stiletto to push out corners and small pieces.
If you are a quilter, get yourself some gardening gloves with rubber palms. Wear them when free motion quilting to guide the fabric layers around your needle. The rubber gloves remove some tension from your wrists while protecting fabric from oil and sweat on your hands.
You will soon find yourself reaching for painters tape again and again. It is handy to mark seams to make them straight. Write notes on bits of tape to track pattern pieces and stick them to the fabric. Painters tape can also be used to mark lines for quilting.
Hang a flannel backed table cloth to make an affordable design wall. Small pieces of fabric will stick to the flannel. Use pins for large pieces, then step back to see your work before sewing it all together. It is especially handy for piecing quilts.
Binder clips come in varying sizes. Use small clips to hold patterns down, or use them in place of straight pins. The larger clips are great for keeping all the pieces together for a single project to sew later.
Grab a Magic Eraser instead of a pin cushion. Every time a pin is inserted, it is cleaned and ready for the next project. This trick is especially nice for removing residue from manufacturing. Make sure it doesn't transfer to your expensive or delicate fabric!
Keep a file sorter in your sewing space to organize rulers. They come in a variety of shapes and sizes that can be neatly inserted in the organizer. Then the rulers are easy to find and grab when you need one.
Use a tote bag meant for gardening to hold sewing tools. Scissors, a seam ripper, thread snips, rotary cutter, etc. all fit in the pockets. Grab the bag to move it from your cutting space to sewing space, so your tools are always within reach. This is a great idea for attending sewing retreats as well.