So, my knee feels basically back to normal now. That is, I don't have any pain / discomfort doing anything anymore. Of course, I know it's still not back to normal yet, so I'll have to continue to be careful with it for a while. At least I can start the process of ramping back up to a normal training level.
I rode Saturday and this morning (4:30am wake up time again! It's going reasonably well so far, but it is pretty darn early.) and felt good on the bike both times. I'm still riding in a very easy gear, and I'll probably stay there for the rest of this week, just to be sure. Hopefully I've learned all of the right lessons from this injury; clearly I missed at least one last year.
I did a bodyweight upper body and core session yesterday (I'm not going to do any leg strength work, except rehab-type exercises for a while). I finished it off with a few rounds of shadow boxing. I tried shadow boxing a few years ago and I guess I just didn't "get it". I didn't find it particularly interesting or effective at the time. After reading an article that Ross posted, I decided to try it again. This time, I did it in front of one of the doorwalls in my basement. Since it was dark outside, I could see my reflection in the mirror pretty clearly. That made it a lot more fun! Per the article, I also tried to really keep moving the whole time, which made it more effective. I was a little surprised at how tired it made my legs yesterday, but I guess I shouldn't have been, I've hardly been working them for a month or so.