Yes, I have bilaterial tendinitis though the left is worse than the right. Also have golfer's elbow in the left arm (I don't even play golf!). My chiropractor also recommended, as previously mentioned, wearing the band on my elbow to help with that.

From experience - best advice I can give is be aware of your posture while working at your desk (sit up straight) and take breaks often. Also, be aware that you aren't bending your wrists while sleeping, sometimes wearing a brace will help keep your wrists straight.