I would do a search for the rippetoe rehab article that was posted here not long ago.
Otherwise:
1. ice - 3 times a day for the first 4 days (or so), no more than 20 minutes each time. after, ice immediately after working out.
2. gentle stretching - never with your arm straight out; always with the arm lodged against a wall at a 90 degree angle.
3. books - some fantastic books out there that will break down icing, stretching, and multiple variations of rotator movements. I recommend the 7-minute rotator cuff solution
4. anti-inflammatories like Voltaren Rapiden - very controversial, you'll have to figure this out for yourself
5. post-icing rehab (rippetoe) - start out light and rather than avoiding the exercises that caused the injury, do them - something about range of motion and scar tissue
6. Physical therapy - I say don't waste your money. he/she is going to start out with ultrasound and lead into interstitial (spelling?). I do like the interstitial machine, but I would recommend buying one of the small ones, get some gel and set it at such a low level that you can just feel it slightly tingling. Otherwise, this machine, used improperly, can fuck you up - destroying cells rather than delivering blood to them.
7. cardio - get that blood flowing.