Good one, Joe. I've been writing regular postcards to an elderly friend (she loved getting the mail every day) but she passed away recently. I have postcards and stamps to dedicate to this cause. If you send a large postcard (because you have lots of topics to mention) then it should get a regular first class postage stamp.

I often put letters to go on the mailbox outside the front door because the postal carrier comes early and they won't be out there long. A photo of the card held to the mailbox by two clothes pins will go up on Instagram and other accounts on the appointed day.