Peace of mind. Replying will make other people feel better, and you'll feel better. And don't forget about the positive karma - if everyone does this you'll get replies, too! If you still need something, here's your gold star.

No! Always reply as promptly as you can. If you've reached Friday and people are still waiting for a response, Replyday is the time to handle your business.

Yes. Don't get hung up on "what" or "how." Focus on "who." Did you get someone send you a message? Reply to them. By Friday.

This is all a judgment call, but here are some questions that might help. Were they sincere? Do they expect a reply? If you saw them on the street, would you have to scramble for an excuse for not responding? Reply accordingly.

We all get busy, and getting back to everyone isn't always easy. But someone contacted you and they're eagerly/anxiously/excitedly waiting for your reply. End the week by replying to the people who are waiting to hear back from you.

Fridays. Every Friday.

Hahahaha. You won't. Very funny. Reply by Friday and go into the weekend feeling like a champ.