-unless you have good padding, the arms are a horrible shot spot
-I use the stomach as two areas--right and left side
-deeper can be better for avoiding skin reactions, as long as you avoid muscle
-the butt is an awesome area to inject in, tons of fat
-on another forum I read a thread that massaging the area vigorously 24 hrs in advance reduces pain (but massaging too close to the shot time increases it, so do it the day before). I've been too lazy to try this, but I probably should.