Cogito
This is my diary. I do a lot of philosophizing and meta-cognitive BS whenever I write in my diary, so I decided to call it Cogito because in Latin it means "I think" and is essentially the first half of one of philosophy's most famous phrases Cogito ergo sum which means "I think, therefore I am."
This practice has been a source of solace for me. Life is hard in a lot of ways, and being able to write it all down has been very helpful for me emotionally.