In my recent Haiku phase, I found this awesome book at the library. Haiku by Patricia Donegan. It's an arts and crafts book for kids, sort of. It describe the basics of Haiku, how to write one, techniques for getting started, and then several activities for making more. There are loads of examples from masters, and from kids around the world. It also goes into haibun (haiku with story), haiga (drawing and haiku), and renga (linked poetry) and offers exercises for practicing all of them.
This book is the epitome of why I like kid's books. They lay it all out there plain and simple and even adults can figure it out. You don't have to read a massive tome of information before getting out your pen and paper and trying out your new favorite form of expression. You read a few pages, and then whether you are good or bad at it, you just do it. And, as they say, practice makes perfect.