Keep an eye on what's going on around you. Sure listen to that damn thing but don't lose yourself in the music when you are using public transit. Put your bag on the seat but move it when someone else is standing in the aisle. Stand if you can and offer your seat to an elder or a youngster. Thank the driver when he waits for you- it isn't requiredthat he wait but your thanks is required when the bus is held for you!