Inspired by the folks over here...
Dear Self: You are officially registered for your first 50K. Get on it.
Dear Husband: I am counting down the days and miss you like crazy.
Dear woman I encountered on the street earlier this week: I hope you are okay. You got me thinking. A lot. I wish nothing but hope and peace and joy for you.
Dear Chicago wind: Erm...enough already?
Dear Sister: I am thinking of you and have been thinking of you, especially this week. Hang in there.