Communications Etiquette (as I understand it):
1. Phone - Need to talk NOW [usually].
2. Texting / Messaging - Within the hour.
3. E-mail - Within the day.
4. Snail Mail - Weeks to months.
5. Pigeon Post - Seriously?
6. Telegram - Nobody uses these anymore, stop.
7. Smoke Signals - Alright, you're just mocking me now.