What triggered my love of haiku was this book that I have a copy of: Haiku: An Anthology of Japanese Poems.
Here's a nice page of classic haiku: The Haiga Pages. Also many classical haiku can be read on Poemhunter.com.
I briefly studied haiku sometime in probably high school, but I remember feeling intimidated by it. My teacher tried to keep us within the 5-7-5 syllable pattern which is the Japanese method, but I've learned that the rules are not so strict in English. So tonight I tried my hand at some.
Walking, worried eyes
down a lonely road,my car broke down.
Birds singing,too confused to sleep,
midnight super moon.
A floral branch hangsin front of the moon,
I gaze in my loneliness