It's a great exercise—i recommend it! Each year, i was surprised by several notes, in the sense of "I forgot that this even happened! Glad i made the note," or even "This happened this year? Seems like ages ago." I also go through my social media posts, and sometimes there are gems and other times it's "I can't believe i posted this." It's a great New Year's Eve tradition.

(I think my link pointed to the wrong place?? This one should be right if anyone's interested.)