Greg Van Eekhout
I don't believe in writer's block in the sense of being unable to write, but I know what it's like when you feel incapable of writing words that don't suck. When that happens, here're a few things I try:
1. Just keep writing and hope upon later reflection the words don't suck as much as you think they do. This actually works a lot of the time.
2. Go read something by one of your favorite writers. Sometimes splashing good words on yourself helps you drip some good words of your own on the page.
3. Take a walk. There's something about getting the circulation pumping and the sensory stimulation of trees and birds and people and dogs that can unknot a plot problem or alleviate a sense of stiffness or staleness.
4. Stop trying to write and instead just tell yourself the story, verbally or in informal text. Separating the job of crafting good sentences from the job of telling what happens can sometimes help you get things moving again.
5. Go somewhere without access to writing materials and tools. No laptop, no notebook, no pencil. Maybe take a hike. Maybe take a shower. Removing the pressure of having to write can sometimes free you to think.