I'm old fashioned. I think if you and another person are walking into a door at the same time it is only right that you hold the door open for them so they can get through. It isn't a race, if you wait in a store line another 20 seconds it won't hurt you really. When I see young men won't hold a door open for a woman it drives me mad. It's not difficult to be a gentleman.

Also people rude to servers. I have some good friends who do that for a living and they tell horrible stories about how people treat them.

also say please and thank you to people. If you don't want something say no thank you. It isn't very tough.