... one flaw throws the loveliness of [everything else] into focus. I remember reading that Shakers deliberately introduced a mistake into the things they made, to show that man shouldn't aspire to the perfection of God. Flawed can be more perfect than perfection.

Enthusiasm is a form of social courage.

Happiness can seem like an abstract, transcendent notion, but in fact, I found that getting enough sleep (very important!!), getting exercise, not letting myself get too hungry, not letting myself get too cold (I'm a person who is always cold), made a big difference. Partly because I felt happier, partly because feeling physically comfortable makes it easier to keep other difficult happiness-boosting resolutions like biting my tongue.

I always say you can self-medicate through closet cleaning. Everyone knows that feeling of a clear surface, and how it makes you feel you can really focus and start your work.

Now that I've relinquished my fantasies of all the people I wish I could be, and stopped feeling guilty about not going to the opera or pretending that I want to attend a foreign policy lecture, I have more time for the things that I truly enjoy.

I've noticed that a lot of people do much better when all their resolutions are framed as 'Yes.' Not something like, "I'm going to give up French Fries," but something like "I'm going to eat three vegetables every day." "I'm going to hug more, kiss more, touch more." "I'm going to listen to more music." They do better when they frame things in the positive. And I think this is just part of human nature.

Your unhappiness doesn't help anyone else - and in fact, as I mentioned in another answer, happy people are more altruistically inclined. So happiness is not a selfish goal.