I had a shoulder injury a couple years back and I used this method to rehab it. I'd do about half my max on pull-ups 5-6x per day 3-4x per week. When I started

I had a shoulder injury a couple years back and I used this method to rehab it. I'd do about half my max on pull-ups 5-6x per day 3-4x per week. When I started, my max was low and I was only doing about 2-3 pull-ups at a time. After a couple months of doing it I was easily at a max of 15 or so pull-ups per set. Lately I've been doing Pavel's "simple & sinister" kettlebell program and it's very effective. At first I had to really stop myself from wanting to do more reps and sets, but I really love how it keeps you from wearing yourself out. Slowly and with consistency is the best method for most things in life.