First, it's important to identify whether I actually have writer's block or if I'm just being lazy. Sometimes it's a matter of just keeping my butt in the chair and my fingers glued to the keyboard to push through a wall. But occasionally, I really have written myself into a corner or have a real plot problem and in those situations it's usually best to step away from the keyboard. I'll do something like go on a long drive, bake something, paint something, cut up magazines and make collages...anything to occupy the front part of my brain so my subconscious is free to work on the problem. I'll also call up my critique partners to talk it out. Sometimes when you verbalize it, it's easier to see a solution. I also use my husband. He's a great brainstormer!