It can make a huge difference on the amount of happiness in your life.

The idea caught me up in my twenties and
never uncaught.

I like being reminded, and I appreciate it
when great thinkers and writers elaborate
on details and the way societies can make
holism work for them... here thinking of
writers like David Bohm of holographic brain/
universe fame, and David Peat with the
wonderful Blackfoot Physics.

Do not dwell overmuch on the past, and do not worry one's self overmuch about the future (beyond planning for it calmly in the present). Worrying about either is typically unfruitful - the past because it cannot be changed, the future because life is so bizarre that the scenarios you anticipate will almost certainly never come to pass.

I forgot to add simplifying one's life, in the form of possessions and material desires. What you describe is often the result of a hankering for "things."

and lessen your dependence on other people, as well, as much as it increases your contentment. People can be like variables in our individual happiness equation and the more variables there are, the more complex the equation can get, i.e. people will have different personalities, disagree with you, be incompatible, etc.

I try not to be a bother to others so they are not a bother to me.

Welcome to DU!