http://well.blogs.nytimes.com/2009/0...-tennis-elbow/

Get your bike fit sorted - if you've had a fit but the fitter didn't look at you in all the hand positions you use, consider that. Don't keep a death grip on the bars, just a light touch. Look at your ergonomics at work and your home computer.

Work out trigger points in the forearms - a spiky ball is good for that.

... all I can think of off the top of my head ...