Note to self

1. The mailman comes every day.
2. There is a finite amount of space in a mail box.

Therefore, if you do not pick up the mail for more than 3 weeks, you are likely to run out of mailbox space, making it difficult for the mailman to put more junk mail into the now-full mailbox.

In that case, it is likely he will leave you a nasty note for making his job harder, steal all your mail, and stuff it somewhere else, like possibly the post office, where you'll have to go pick it up.

On an unrelated note, post office lines are long.