Make sure your bicycle fits you and is in good working order. Inspect the following before each ride to make sure your bicycle is in good working order:
tires/wheels
brakes
chain
lights
reflectors
bell
seat height
Wear comfortable reflective clothing conducive to weather conditions (not too baggy)
Ride within your abilities
avoid busy streets
ride a properly sized bicycle
Understand how to properly signal turns, lane changes and stopping
left turn: fully extend your left arm out to the side
right turn: fully extend your right arm out to the side or bend your left arm up at a right angle with your hand flat.
slowing or stopping: extend your left arm out at a right angle with your hand open