If you are planning to writing a poem a day in April, there are sources of inspiration all around. Starting in the most obvious place, check out the NaPoWriMo site. You will find everything you need to get started. Add your blog to the list of participants and join the community of writers.
There are also poetry prompts being published on blogs across the Internet. Check out:
When stuck (which will be soon enough) I plan to use The Daily Poet: Day-By-Day Prompts For Your Writing Practice by Kelly Agodon and Martha Silano (Two Sylvias Press). Feel free to share your fave NaPo links here.