According to Roger Darlington:

• be realistic
• recognize that happiness is a state of mind
• be as healthy as you can
• live with a partner whom you love and respect and who feels the same way about you
  • kiss, cuddle, compliment often
  • regularly buy unexpected little gifts
  • share triumphs and troubles
• have a son or daughter (eventually)
• have a cat or dog
• keep in touch with relatives and a small group of friends
• don't be afraid to remove negative people from your life
• smile a lot
• laugh a lot
• say what you mean and mean what you say
• be politely assertive
• give lots of compliments
• give small gifts to your friends
• perform anonymous acts of kindness
• spend less than you earn
• use your credit card as a convenient way to pay for major expenditures on a monthly basis
• don't borrow money
• don't lend money
• don't gamble
• give regularly to charities of your choice
• get your hair done
• surround yourself with pleasant smells
• stay close to nature
• spend a little time observing the night sky
• read a quality newspaper on a regular basis
• subscribe to a weekly or monthly magazine
• read regularly and widely
• listen to some rousing music
• have a favourite television show to look forward to weekly
• treat yourself often to something cheap yet cheerful
  • chocolates
  • flowers
  • a cd
  • magazine
• cultivate a few favourite places to eat out
• stretch yourself
  • physically
  • mentally
  • geographically
• do something you've never done before
• do something creative
• join a group with a purpose that meets regularly
• keep a gratitude journal
• keep a diary
• take lots of photos
• arrange strong IT support
• make yourself a mental safe place
• ask cab drivers for advice (they think they know everything)
• remember it could be a lot worse
• respect yourself
• start planning your retirement
• make a will
• make arrangements to donate organs upon your death