One of the things I like best about poetry is that no matter how you are feeling, there is a poem that will speak to your mood.
Here are some examples:
Happy? Try Poems for a Good and Happy Life compiled by Myrna Reid Grant or perhaps you are also a bit hungry and Eat Drink and Be Merry: Poems about Food and Drink edited by Peter Washington would better suit.
Suffering from a recent breakup? Try It’s Not You, It’s Me: The Poetry of Breakup edited by Jerry Williams
Sleepy? Try Poems of Sleep and Dreams edited by Peter Washington