The Ode Less Traveled: Unlocking the Poet within

I picked up this book partly because it was by the always-interesting Stephen Fry, but mostly because of its sublimely apposite title. Turns out Fry has a passion for writing formal poetry, and he thinks we should all give it a go; I haven't worked my way through the whole book yet (there are lots of funny exercises along the way), but he has convinced me that there might be something in it. It's a fascinating and addictive book for anyone interested in writing or better appreciating poetry.

Incidentally, Stephen Fry has a brilliant blog.