Originally Posted by
Bike Chick
Just try to relax and keep practicing doing downhills until you gain some confidence. If you are more comfortable keeping one foot unclipped, then do so but try to work toward staying clipped in. My best advice is to sit back in the saddle, trying to keep more of your weight on the back wheel, break with your back brakes, not your front, stay down in the drops, pinch the top tube with your knees, and just keep practicing. Also make sure your bike fits your correctly. If you are riding a bike that doesn't fit you, you can really feel out of control on a downhill.
Good luck!