I have grasping problems with my hands. I use a pair of spring handled needle nosed pliers to pull the needle through when I hand quilt. I bought them at Harbor Freight. They come with rubberized handles and are in a mini size. Just $1.99.
I use painters tape to mark a grid on my quilt for quilting, instead of using a stencil. I get it in different widths to vary the design.
I have templates for squaring quilt blocks cut custom at the hardware store. They cut them out of plexiglass for free, just buy the plexiglass. I mark the top with a label to know what size they are. Very cheap and sometimes free if they have scraps.