Since 2011 I've bought various calendars for storing all my mail info. I like the GreenRoom ones from Target, very clean, and hold enough room to write. Last year I had a smaller one from them but decided to go bigger this year. I actually wanted to buy one many months ago but decided to wait until my organizer finished this past June. I was walking through aisles at Target when I found products on the clearance shelf, there a stack of calendars were waiting, and for only about $4.
Every time I receive a letter, I write "Letter/Letters from" and then the name (s) on the day I found the dear letters waiting in the mailbox. There's also a spot on the lower right that says "notes" where I'll usually put friends birthdays along with the date so I know to send them a little something special. :)
Last week's layout of outgoing mail. I sent 6 letters out~ one to my cousin and the rest to friends ~ all far away. I'll usually send out more than one letter at a time.
I find this is a way to stay on track for replying in a timely manner. I can look and see "oh it's already been two weeks since I received the letter from ____, I should start a reply. " :) I would like to send replies around a week after receiving, or sooner ;) I did happen to find some lovelies waiting for me at the post office today. I am switching box numbers by the end of the month so I'll have to send address changes along with the letter. :)
In case you needed inspiration, or organizing tips, I hope you found this helpful. Have a great day, friends!