Then I realized that I was tilting my head to look down at my laptop screen -- and I've been doing so for *years*. I've learned at work that one's monitor is supposed to be at eye level, but I never thought about it at home. No wonder I have knots on knots in my shoulders and neck, even though my life is a lot less stressful than its been in years!
So this afternoon I went to Staples and found a wireless keyboard and mouse set on sale for $30. Set up was easy, and now I'm typing on a full sized keyboard looking at a screen that is actually at the right level! My laptop is perched on top of several large books, so it's not an elegant solution, but I can feel a huge difference in my back and shoulders.
Using the mouse instead of the touchpad is also helping a lot, which I didn't expect.
I keep thinking that all this is happening because of my Malkuth meditations. . .