Is the cure to writer's block as easy as write as you speak? The idea has merit. Often when we are in the throes of writer's block, I think it stems from trying to force our writing in a direction that doesn't interest us or doesn't sound like us.
Write as you speak. ~~Joel Saltzman
Another bit of writing advice often given is write what you know. It's trite, but writer's block could stem from the fact that we haven't fully researched our topic. So, here we are, groping for facts to turn into words and phrases and they won't come. Why not? We don't know the topic well enough to organize it and put it into our own words.
My advice.... know your topic well enough to speak fluently about it.... Then, write as you speak. Write about the topic as if you are just talking to a friend over coffee. That should loosen things up a bit.
Many say there is no such thing as writer's block. I think we talk ourselves into it and can likewise talk ourselves out of it by writing as we speak.
This one's for Mama Holly.... hope it helps!