Postmortem on a (possibly) failed site

A few weeks ago, I began work on an authority site intended to drive visitors to Clickbank products. I spent a lot of time preparing a very specific strategy for creating the site, rolling out content, and backlinking. And for those first few weeks, things worked out really well. I was getting page 1 rankings for the vast majority of the articles I'd posted targeting the keywords that I was trying to rank for, and seeing a nice, steady stream of traffic.

Then a couple of days ago, every single page I was being ranked for dropped to page 6 or 7 on Google, and haven't recovered. Previously, it had been very common to see individual pages drop to very low rankings from time to time, but they'd tend to recover within a short time span. Clearly, something very different has happened this time around, and I'm attempting to figure out the cause.

I watched a video at the blog on Panda at seomoz (which I unfortunately can't link here due to my post count) which I found to be very informative. It sounds as though, post-Panda, Google is placing sites into the "good" and "not so good" categories based on a bunch of factors. I can see why my site might have been categorized as not having a great user experience.

There were a few tactical errors that I've come up with so far, that I believe may have gotten me the results that I'm currently seeing:

1. Bounce rate
The site was designed to get viewers in and out as quickly as possible. The articles on the site weren't particularly well written (hey, when you're trying to rank for some of these long tail keywords and give them 2% density, creating something that doesn't sound like garbage can be a hefty task!) I basically just wanted people to click my affiliate link ASAP. Which Google does not like.

2. Close to 0 actions per visitor
Again: Designed to get visitors in and out. Visitors had no real reason to click around my site. They'd tend to see the page and either immediately go back or click my affiliate link.

3. I installed Google Analytics
I remember reading a story on this forum from someone who had a bunch of sites and installed GA on a couple of them. SERPS rankings on these specific sites went down dramatically while the others retained their rankings. I'm inclined to believe that this could have been pure coincidence (and I certainly don't want to spread misinformation), but in the future I'll refrain from using GA. Woopra seems to work quite well as an alternative, anyways.

If you want to check out the site, it's at how-to-get-abs-expert (add a .com). I hadn't added the Reviews page referenced in the header and sidebar until after my site's rankings went down. I suspect something like that (i.e. a piece of truly useful content) would have helped the situation a bit if I'd implemented it sooner.

I'm going to continue working on other sites, but hopefully my rankings will return in the coming weeks. Who knows, maybe I'll be back in business tomorrow. If not, lesson learned I suppose.

Thoughts, similar experiences, tips on avoiding this sort of thing?