If you are riding narrow roads I definitely recommend a headlight and flashing rear light. Wear bright colors and follow the rules of the road. Even on roads with proper bike lanes and wide shoulders cars will still crowd you sometimes. The more we ride, the more cars will get used to seeing us out there. I did a tour this summer from San Luis Obispo to San Diego and the best bicycling was in SLO, not because the roads were so great, but because the driver's are very used to seeing bicyclists and they share the road.