FIRST AND MOST IMPORTANT - SLOW DOWN!!! Traction and visibility is limited in the fog and rain. Use lights and reflectors whenever possible. Don't forget, fog can also make street and pathway surfaces as wet as rainfall. Wear bright colors. They help other riders and motorists see you. Braking and stopping in wet weather, it takes longer to engage, and longer to stop your bike, and it is much easier to skid or slide your wheels as you brake. So, start braking earlier and more gradually than you would on dry ground. Beware puddles. They can be deceiving, you truly have no idea what lies beneath the surface. You may want to ride around puddles to avoid potholes, cracks in the pavement or other things that lie hidden underwater. Even the debris that gathers in these low spots can be dangerous, or cause unwanted flat tires. Get some fenders. Rain in our area rarely lasts all day, so our rain and fog situations rarely require a full rain suit. Protecting yourself against water sprayed up from the streets is the main issue. A light waterproof jacket and fenders should be all you need. Invest in some removable fenders that will dramatically help keep you and your bike clean from the muck and water on the road. Ride with a friend or group. Chatting and drafting helps the miles go by more enjoyably. But don't let group rides become hammerfests. Avoid hard, fast riding when the temperature is below 50F degrees (10C). Instead, stay steady and bank base miles. Don't overdress. You should feel chilly for the first few minutes before pedaling warms you up. If you start off toasty you'll soon overheat, sweat can become uncomfortable in damp clothes. Beware of tight shoes. Wearing thick socks can make your cycling shoes too tight. Feet freeze fast when circulation is reduced. If this is a problem, buy a larger pair of shoes for winter rides. Roomy booties are a good idea too. Ventilate. Your jacket should have a front zipper with a large tab that's easy to find and grip while wearing long-finger gloves. Zip down when climbing or riding with the wind, and anytime you sense body heat building up. The drier you stay, the longer you can ride without a chill setting in. Install a taillight. And carry a pair of reflective ankle bands. The sun sets with a thud in winter so you might get caught by dusk several miles from home. Carry two tubes. When your fingers are freezing it's easier to install tubes than it is to patch them. Make stops brief. The longer you're off the bike, the chillier it feels when you start riding again.