Found a small plastic hand sharpener that works great. When I use a pencil, I've taken to the ones you buy by the dozen, painted orange at Home depot. They are dark leaded and come to a fine point. I sharpen them often. For fine work, I use a marking knife, with kind of an arrowhead point to it. My wife has a fantastic ac powered sharpener for her art pencils, which requires I hustle into the house to use. The little sharpener that works best came with a package of oversized childrens pencils, which are about half an inch in diameter and are very readable with old eyes. I have tried mechanical pencils but find I break the lead constantly, which irritates me. My little sharpener is tied to a loop of twist tie with a small clip on it so I can hang it up in plane sight after use.