Threads magazine, #87, pp. 54-55, had instructions, available online, for making the perfect leather thimble. The article and thimble design are by Samantha Brenneman. There is even a pattern. Yay!
I don't always use a thimble when I sew, mostly because the same protection against pain and puncture that thimbles provide alters the sensitivity in the fingertip one sometimes needs in maneuvering the needle quickly and precisely through certain fabrics/materials. I am going to try out this leather design to see it it helps.