Posting to a blog:

Only one of the many things it is easier to do every day than to do every two or three days.

At least for me. I think many people are not like that, but I have more than once said "I will do (not do) the following thing every day, starting now" and then gone and done (not done) that thing for many months, in some cases years, in one case for the last ten years. But if I ever miss two days, it all goes to pot.

P=mv! It is not just for physics!