Friction permeates every aspect of your life.
Friction is described as the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other — but there's a different kind of friction that I often think about: the friction to do something good when doing nothing is easier; the friction to change a routine; the friction to throw things out instead of just leaving them hanging around; the friction to go to the gym even if you're a little tired.
Friction permeates every aspect of out life, and reducing (or adding) friction can be an effective strategy to change things. The next time you do something that doesn't make you feel good, or you don't do something that would make you feel good, try to think if adding or reducing friction could change that behaviour. There's a good chance it will.
PS: yes, this is a very brief post, not the 1.500-words SEO-friendly stuff I should probably write; but I want to write more, and starting again with little thoughts and tidbits might reduce the friction to do it. Or at least that's the idea.