If you write fiction of any type, you have to write dialogue. I was surprised to learn that a lot of authors find this the most difficult part of writing.
It has always been my favorite part of writing a novel. When I am writing, there are constant conversations going on inside of my head and I seem to have trouble inserting the descriptions in between them! I'm not saying that my conversations always 'work'. I do many, many re-writes.
In surfing the Internet for writing advice, I came across the concept of recording your dialogue and then playing it back to yourself. Have any of you ever done this? Did you find it effective?