I recently helped a dear. dear friend with her Mom's house after her Mom died suddenly. It was kind of the opposite of a typical girls weekend, but being with her to help and feeling like I could cut down the long list of tasks made me happy.
I turned my OCD-like sensibilities towards her Mom's desk. And as I sorted through all the paper work that builds up in living a life - bills, receipts, bank statements - I found many letters and cards written from my friend to her Mom. Her Mom had kept them all. We also found many pictures, programs, change of command invites, and other momentos from my friend's Air Force career, all the way back to her graduation from the Academy.
We do so much electronically now that we forget the impact of a card or written note. These pieces of paper formed a bridge between my friend and her mom as her career took her around the world, and in keeping them all her Mom showed the pride and love she had for her daughter.
Other than Christmas cards I can't think of the last time I sent a note or card to anyone. It's time to break out the box of blank cards gathering dust on my desk and let people know I love them lots. :-)