These are some key takeaways (stolen without permission from elsewhere...)

Appreciate

• Be grateful and count your blessings (literally). Recycle happiness by reminiscing about good experiences.
• Think of counterfactuals. (“If I didn’t have this positive thing, what do I lose?”)
• Breathe deeply. Expand your time — by slowing down.
• Actively want to be happier. Motivation and investment matter.
• Stay in the present.
• Be passionate, but don’t obsess.

Care

• Socialize with close others.
• Associate with happy people.
• Give the people around you opportunities to be generous. Ask them for favors.
• Be actively kind (and occasionally reminisce about your recent acts of kindness).

Plan

• Go for ‘approach’ goals instead of ‘avoid’ goals.
• Do work that you enjoy doing. Flow.
• Keep your goals intrinsic.
• Conclude negative experiences as soon as possible.
• Make a point of avoiding experiences that make you feel bad.

Give

• Don’t think too much about money. It will impair your savoring ability. It's also bad for your family life.
• Be time-aware, but don’t think of time in terms of money.
• Prefer experiential purchases; avoid materialistic goals.
• Don’t do ‘comparison shopping.’ And don’t place much stock in the happiness potential of any one positive change.
• Follow the herd. “The best way to predict how much we will enjoy an experience is to see how much someone else enjoyed it.”
• Savor anticipation. Delay consumption. Actively anticipate good experiences.