Having a sore elbow is very irritating, I know. It's definitely one of those things that you take for granted until it doesn't work properly anymore.
Apparently this condition is caused just as often by trauma as by repetitive motions. I know if suffered from it when I tried to lift something heavy too quickly and I guess I just injured the area.
I found that the hardest thing was keeping the area relaxed. Because it hurt I kept wanting to tense it up all the time, but that made it worse. I had to force my muscles to ignore the pain and relax so it could heal.
I found that anti-inflammatory painkillers worked wonders as well!