I just had an old work friend who tried doing three (just three I do around 12-15) good things everyday on Facebook for 180 days.
It’s a great practice and you certainly don’t have to share it online. I’m up to almost 800 days now plus a couple hundred the first time I did it so maybe close to a thousand days. I do it and the blog every night and it’s one of my best practices.
So I encourage you to give it a try!