medicalstate: A Brief Guide to Sutures. My current repertoire consists of the simple (over and inverted), subcuticular, horizontal mattress, vertical mattress, and lock-stitch sutures. This set of skills takes care of most problems.
Surgical suture sampler, circa century, from the Zurich Medical History Museum in Switzerland. Just look at the variety of stitch techniques and detail, all appropriate for different anatomical regions and types of injury.