Note: I'm not sure if this is against the rules. if it is, please forgive me; I did look.
You've written your opus. It's fabulous! Your editor says it's great, your beta readers rave, everyone loves it.
And you can't write a blurb for it to save your life.
Don't feel bad! Blurb-writing is one of the suckiest parts of being an independent. It's really hard to write blurbs for yourself. (Ask me how I know.)
I can help. You can find out more about my blurb-doctoring services here:
http://blurbdoctor.blogspot.com/