Originally Posted by SEAcarlessTTLE
Good advice in all of these posts. Full fenders with a good mudflap will not only help keep the water and grime off of you but also your bike and drivetrain (not to mention any fellow rainy day riders behind you).
As for your eyes, I find that a light cycling cap works great to keep water off my glasses. It's thin enough to fit under the helmet comfortably, and the brim is just the right size---long enough to keep water off my eyes, short enough to see past easily without straining my neck.
(:
Both of these are great pieces of advice. Whenever it rains, I throw a cycling cap underneath my helmet and it keeps my glasses clear in everything but an absolute deluge.