In reply to dominikk:
These articles are really good and well worth reading very carefully.
I had golfers elbow for years and even gave up climbing for 9 months at one point. In the last 6 years I not had any issues.
A few tips
1) Never climb while still taking ibuprofen. You are masking the injury and will aggravate it.
2) That 2nd article covers extension exercises with elbow at different angles: when I added this to my extension exercises (after years of problems) I found it amazingly effective. I rarely see anyone who recommends this or who does it. I also tend to use only 1-2.5kg rather than the higher weights often recommended and they work really well.
3) I came across a supposed miracle stretch by some wad (maybe Varian) which recommended a lie-ing down stretch which I tried and totally buggered my elbows! Maybe I did it wrong, but if you come across it take care.
4) Build an elbow stretch routine into your daily routine and a ALWAYS after a climb.