This seemed really interesting so I'm going to try it! :)
The challenge: Write a letter a day, for thirty days to~
Day 1 - Your Best Friend
Day 2- Your Crush
Day 3 - Your parents
Day 4 - Your sibling (or closest relative)
Day 5 - Your dreams
Day 6 - A stranger
Day 7 - Your Ex-boyfriend/girlfriend/love/crush
Day 8 - Your favourite internet friend
Day 9 - Someone you wish you could meet
Day 10 - Someone you don't talk to as much as you'd like to
Day 11 - A Deceased person you wish you could talk to
Day 12 - The person you hate most/caused you a lot of pain
Day 13 - Someone you wish could forgive you
Day 14 - Someone you've drifted away from
Day 15 - The person you miss the most
Day 16 - Someone that's not in your state/country
Day 17 - Someone from your childhood
Day 18 - The person that you wish you could be
Day 19 - Someone that pesters your mind-good or bad
Day 20 - The one that broke your heart the hardest
Day 21 - Someone you judged by their first impression
Day 22 - Someone you want to give a second chance to
Day 23 - The last person you kissed
Day 24 - The person that gave you your favourite memory
Day 25 - The person you know that is going through the worst of times
Day 26 - The last person you made a pinky promise to
Day 27 - The friendliest person you knew for only one
Day 28 - Someone that changed your life
Day 29 - The person that you want tell everything to, but too afraid to
Day 30 - Your reflection in the mirror