Need help coming up with letter topics.?

Question

My best friend's 24th birthday is coming up soon, and as a present, I'm planning to write her 24 letters. I've written up 15 letters so far, but I'm having trouble coming up with other topics to write about for the rest of the letters. Do you guys have any ideas or suggestions?

Answer 1

think of what you talk about with her when you are hanging out, or what  has happened in the past between you two.

Answer 2

well you can go to the store and look at some birthday card and get some ideas there or see if you can get anything online