Practical advice to deal with injuries

I have struggled with various injuries, generally tendinitis, for years and I know what an impact they have on musicians. The healing time for tendinitis is about six months, if all goes well. Here are some thoughts:
1. Adjust your technique, and in general your way of using your arms and the whole body. Use more of the back, the triceps muscles, and the upper arm. Use opposite muscles to balance those that are overworked. Sit properly. Tendinitis is a repetitive injury. Other activities contribute to the injury, such as typing, some types of sport. When typing or using the mouse emphasize the other hand or switch hands frequently. Have a proper working place - a gel pad, an ergonomic keyboard, a chair with an appropriate height. Computer use is number one as the cause of repetitive injuries; Playing a musical instrument is number two. If you are a musician, you got them both (assuming you have entered the modern age, but then you would not read this blog).
2. Stretch, especially stretch the muscles involved. Stretch always before and after playing, typing, etc.. also between sessions. Find a set of stretches that are appropriate to the injured area. Stretch and hold 5-10 seconds. Do not overstretch. Make sure that there is good blood flow to the area before stretching - heat has been applied.
3. Take frequent breaks.
4. Strengthen the muscles in the affected area, and in general the upper body.
5. Use heat to heal chronic injuries (a heat pack, or warm/hot water). For some people alternating heat and cold is beneficial. Heat increases blood flow, which heals injuries. Tendons have very limited blood flow (that's way it takes so long to heal).
6. Massage (self or professional). Look into ART - Active Release Technique - a type of massage that greatly speeds up recovery.
7. Apply an anti-inflammatory or natural gel/cream. One of my favorites is Arnica, based on a plant. Acupuncture helps. Doctors also recommend Anti-inflammatory medication; personally I did not find anti-inflammatory medication to be helpful long term.