I usually wash my water resistant watches under the tap, soap and water, sometimes a small soft brush. For watches that aren't water resistant, or I'm not sure, I remove the movement, put it under a lid to keep it away from dust, and repeat the same procedure with the case only, after which I let it dry thoroughly before reassembly. For bracelets, I found that a very concentrated dishwasher solution works best. I let it soak for 5-10 mins, depending on the amount of crud, then rinse it under the tap, using a brush to clean the small crevices if necessary. It really gets the dirt out from between the links. If the watch isn't really dirty, I just wipe it with a clean microfiber towel.
What do you guys usually do? Anything special, specific?