"When it's time to write, it's time to bloody well write, and you put words on the page."
Amen to that. When they pay you by the hour, the word "writers block" is not in their vocabulary.
I just say: Fake it till you make it. Just keep pushin them participles around till somethin jells.
Eventually it will.
And don't apologize for how bad it turned out. Remember that if your audience knew how to write, they wouldn't have asked you to do it for them.