I remembered the envelope! Sometimes goodness comes together just in the nick of time. And every day is Valentine's Day. Or, what I just said is a good excuse for missing VD while needing to use up some of your VD stuff.
Address label by Flow. Hearts in a row by Fancy Pants Design. They're actually called "Love Note Tape Stickers." I bought them a long while back. Hmm. This is beginning to feel like a letter a day thing. And two posts a day time! Wow.