Do you have any tool that you use all the time? Do you recommend it to everyone unprompted? Is it ridiculously specific to your situation, wants and needs? Let every one know how they can make their sewing better!!
I myself don’t have any at the moment, but I have been eyeing a nice pair of left-handed fabrid scissors for quite some time and I might get it some day.
The Dritz seam gauge with the different seam allowance widths from 1/8" and above. Not the slide rule-looking one. This is a many-sided shape. It makes marking things so easy. It’s metal, so you can iron over it.
It looks both nice and practical, I like it!