Okay, so I'm asked all the time during my class visits and presentations how I overcome writer's block. I have a long answer, which I won't bore you with, and a short one.
Short answer: Do mindless activities.
When I need to work out some part of my plot or think of how I can revise something, my mind needs freedom. It needs to be left alone. It needs room to breathe.
Stressing about your deadlines, or the fact that you can't come up with the next chapter (writing out of order helps... just sayin'), or that you don't know how to do a revision doesn't do anything but frenzy your mind.
And you can't work effectively in a frenzied state.
So I always turn to mindless activities--most of which need to be done anyway! Showering. Folding laundry. Cooking. Vacuuming. All manner of cleaning. Driving.
Things you don't have to think about to do. (Although it is sometimes scary to be like, "Wait... Was that light red or green?" Ha!)
When I talk to high schools, I tell them they should play more video games. They love that. But seriously, anything that will allow your mind time to relax, anything that you don't have to think too hard about, is what you're looking for.
My plot pieces and bits of revisions I need always snap into place when I do mindless things. Hopefully this can work for you too.
What do you do to overcome writer's block?
PS. I hope you've been following the SURRENDER pre-release tour! All details are here, and here's TODAY'S POST, and YESTERDAY'S POST and MONDAY'S POST.