Always brake before turning. Ride slowly through sand and gravel. Be aware of Traffic. Look left, right and left again for traffic before leaving a sidewalk, driveway or alley. Enter the road only when the road is clear.
Bicycles are vehicles and are required to obey traffic laws just like other vehicles.
Learn traffic signals and obey them. Just like cars, bicycles are required to stay to the right side of the road. Ride single file as far to the right side of the road as possible. Always ride in the same direction as the cars. Don't turn around to talk to friends.