Catching up on the Buddhist magazines, I just came across a lovely, simple practice on Gratitude from the late Daido Loori.

Expressing gratitude is transformative, just as transformative as expressing complaint. Imagine an experiment involving two people. One is asked to spend ten minutes each morning and evening expressing gratitude (there is always something to be grateful for), while the other is asked to spend the same amount of time practicing complaining (there is, after all, always something to complain about). One of the subjects is saying things like, "I hate my job. I can't stand this apartment. Why can't I make enough money? My spouse doesn't get along with me. That dog next door never stops barking and I just can't stand this neighborhood." The other is saying things like, "I'm really grateful for the opportunity to work; there are so many people these days who can't even find a job. And I'm sure grateful for my health. What a gorgeous day; I really like this fall breeze." They do this experiment for a year. Guaranteed, at the end of that year the person practicing complaining will have deeply reaffirmed all his negative "stuff" rather than having let it go, while the one practicing gratitude will be a very grateful person. . . Expressing gratitude can, indeed, change our way of seeing ourselves and the world.
It is from a book we recommend around here by him (Bringing the Sacred to Life) on "at home" liturgy ...

Gassho, J