I hand write every letter I send. I also personalize each one. I love reading about players/coaches so it is a fun part of the process for me. I wish the stuff I find would include more personal information like if they are married, etc. I also use a nice stationary.
I also started writing letters to family and friends within the last year because I felt like its nice to get mail that isn't bills every once and awhile.
2017 card goal: Sell 25 cards
2017 sold: 5