Yes, in war and in peace, in youth and in old age, in opulence and in poverty, in liberty and in prison, in health and in sickness, in activity and in leisure, in success and in failure, in city and in country, in company and in solitude, in the immense maze of human relations there is only one great recipe conducive to happiness: love. . . Love is the only way out, the secret of secrets. 

Yes, we must visualize at all times how precious life will seem at the moment of death.  Then only will we be ready to give up our pretensions, foolishness, and possessions for a measure of additional life.  "All my wealth, all my power for one more year of life."

My conclusion would therefore be:

decide to be happy
render others happy
proclaim your joy
love passionately your miraculous life
do not listen to promises
do not wait for a better world
be grateful for every moment of life
switch on and keep on the positive buttons in yourself,
       those marked optimism, serenity, confidence, positive   thinking, love.
pray and thank God every day
meditate
smile
laugh
whistle
sing
dance
look with fascination at everything
fill your lungs and heart with liberty
be yourself fully and immensely
act like a king unto Death
feel God in your body, mind, heart, and soul
and be convinced of eternal life and resurrection.

God bless you

- Robert Muller, excerpted from the book Most Of All, They Taught Me Happiness