There are probably as many ways to do this as there will be responders to your message. But I will tell you my experience. At first I did not even sign or title my photographs as I felt it provided the cleanest look of the image in the frame. Also my penmanship leaves a bit to be desired. As I got to exhibit more people would als if I would sign the mat and provide a title of the image. Recently I have been putting a 4x6 card on the back which includes the title and a description of the image or why I took it or what might be different about this image. I also include the technical details like f stop, lens, camera, aperture, ISO setting, and shutter speed. Finally I have a short bio or artists statement at the bottom part of the card and signature. This is mounted on the back of the frames dust cover. People like the description of the images and why I took it or whatever my short description is. It seems to help with the sales but does add a bit of time getting ready for an exhibit. One thing that it does help with though is that once you have accumulated a number of these image descriptions you have done a lot of the work for creating a book of your images through one of the on line companies, or a good gallery on your web site.