Writing through the wall

I hit a wall with my writing pretty regularly lately. Of course, there's a lot in my life that is demanding my time and attention-- so much that I barely have any time to think about my story beyond those few precious moments I get to actually spend cobbling it together. Often when I sit down to write, it takes some time before I actually feel ready to write-- needed time to clear away the rest of my life and day and just focus on my story. But often it's not quite so simple.

Here's the three tricks I use when I feel a wall in my current project:

• Examine my last few paragraphs, I likely took a wrong turn and need to back up and course correct before moving on.
• Jump to a different, smaller project for a few minutes (timed, to force myself to return). For me, this includes writing a blog post, or working on a short story. The purpose is to get sentences flowing in a different (or more natural) setting and then switch back to my main work.
• Spend a few minutes in free writing, and just letting words flow. I have a book of story prompts as well as story dice that I'll use to jump-start this activity. The point is similar to that above-- to get the slow trickle of words up to a decent flow, and then take that into my work in progress.

I typically look at doing these in the order I posted, though different times call for different activities. You have any tricks you use?