Hit 198k today and decided it was about time to clean them up-found 2 over by the horn and one by the battery. Cleaned up the knock sensor grounds as well, but I couldn't find any of the others. Checked the FSM, stickies, and searched but couldn't the stock locations listed. Anyone found them all?
Oh and just from cleaning those there was a noticeable difference in transmission shift times (auto), and the lights seemed a bit brighter (but that could be a placebo effect)

 

Not sure if I'm just repeating some of the grounds you cleaned, but I'll try anyway. There is a ground behind the right headlight, by the windshield washer resevoir opening. Then there is another below the bottom of the airbox/air intake. Then there are a few on the alternator (A slight pain to do). Then the last ones I know is the Knock sensor grounds you already took care of on the Intake Manifold.

Hope this helps

 

There's also one by the left headlight, not quite in the same position as the one by the right headlight. I just found these two this weekend.