If you have ever ridden your bicycle alongside car traffic then you know how invisible you can become. Adding a few blinky lights to your bike is always a good idea. Another good idea is to wear a pair of Zackees Turn Indicator Riding Gloves ($59+). They are made of lycraspandex material and have light sensors so they are brighter during daytime riding. The Zackees LED gloves are powered by two pairs of rechargeable coin cell batteries.