It's incredible how many random technology problems can be solved with a plain old reboot.

Earlier this week, my cable box stopped accepting channel number input from my remote. I could go up and down in increments of one channel, but if I tried typing in a number--say, 72--the TV would do nothing.

This has happened before. I unplugged the cable box and plugged it in again. After it reloaded, the problem was solved.

Just now, I was trying to quit out of Excel by typing command-Q. No luck. The mouse worked. I tried quitting out of Word by typing command-Q. Nope. I used the trackpad to quit all applications and then restart. It's all fixed.

Now that this works, I've had enough at the computer this week.