TIPS: When that seam ripper does get too dull, mark the handle with tape or red nailpolish, etc. and use it for a stylus... helps to guide fabric by the needle and save your fingertip!
I bought a few when notions were 50% off at Joann's to place at both my machines and also have one with my small Vacation/RV box that includes several small hand sewing projects to "pick-up".