I guess many of these "lessons" on being more considerate can be seen as common sense to some, but these lessons come from my personal experiences of getting frustrated when faced with someone being insensitive or inconsiderate.
Lesson #1: Don't honk your car horn before 9am
Much like house renovations or DIY work around the house, this noise affects the people around you. Not everyone is up and getting ready to head out. Many people are still in bed, perhaps ill, recovering from the night shift, or, like me, trying to keep as quiet as possible so that my daughter doesn't get up before she's ready to.
Anyway, honking your car horn in front of someone's house is just rude. If they aren't out yet and you're running late, send them a message, call them, or get down from your car and ring their doorbell.