Where to start...
Rotary cutters for one, squared rules for another.
Like DogHouseMom, I use glue sticks a lot, but in my case, the repositional ones for makeing tearable quilting templates.
The neat little clover needle threaders that sit on the table and actually work without having to squint at invisible needle eyes.
Those are the ones that come to mind immediately, but I know going to a sit and sew day requires an extra carryall for the necessaries.LOL