"Another method that Thich Nhat Hanh invites us to try is to hang a
reminder in our rooms to smile when we wake up. This reminder can be a
branch, a leaf, a painting, or some inspiring words. It can be
anything as long as it carries the message to us to smile upon waking.
We can hang this reminder in the window, above the bed, or anywhere
where we will notice it upon waking. Smiling to begin the day can help
us to approach the day with serenity and inner joy. After we develop
the practice of smiling upon waking we will no longer need a reminder
it will become a natural part of our daily lives. We will find that
love and happiness have entered our lives and are there to greet us
when we wake up in the morning."
http://www.sameergrover.com/articles.htm