I have been struggling with wild swings in Google rankings for my content since early fall. The TypePad blog existed for six months prior to that without problems. (Sorry for the long post, I've tried to boil it down.) http://dvdspindoctor.typepad.com/ Now, I am stuck in a pattern in which my traffic goes along well, then 
disappears all in a moment and stays gone for weeks. Then it all comes 
back in a rush. When the traffic is gone, as it is now, I can find my site via a 
search for the exact name or url, and very specific search strings 
will turn up a listing. Other than that, any traffic from Google tends 
to be off SERPs back in the 100s or 200s. Google has not visited the blog in 7 days. My PR is 5 and has remained so for 9 months or so. It is not affected. 
The blog is good and I do not need to game the SEs. When the traffic returns, my items place quite nicely. There are more 
than 300 editorial posts on the site, plus dozens of archival listings 
done as TypePad sub-blogs (I started doing this before they allowed pages). I have 1.4k or so incoming links, none of them paid or gamed. The site is about DVDs. So the keyword density on "DVDs" is high. I do tend to get incoming links in a bunch. This is when I write about 
a hot topic or have an exclusive, like many other smaller blogs, I 
guess. This happened twice right before the last traffic 
disappearance. I have been using Amazon affil links in the text (as in, I code them 
in by hand). Recently I started using nofollow, but have gone back to 
not using them in case that was a problem. So if I write about a DVD, one of the references to the name would be 
to that Amazon page. My reviews are 100% editorial, in no way sales 
jobs -- they are editorial reviews by an experienced movie reviewer. Have spent at least 100 hours researching, reading the Matt Cutts stuff, making changes and trying to resolve this. No communication 
from Google, although I suspect some of the five or so reinclusion requests have been honored. I would guess a machine is kicking me off and a human is putting me 
back on, but of course I do not know. I have requested an engineer's 
help in the reinclusion requests. My Google traffic is at an all-time low right now, and has been for 
several weeks. Thanks in advance for helping me with this long-running bummer.
Very Difficult to Speculate what is problem. I will suggest dig more into your past Traffic flow. see on which page your visitor use to come and from where and what was exact key phrase. try to use similar key phrase and see still yout site is getting listed in search result See your not connected to any bad neighbor. you have to analyze alot to get reason of Declined Traffice.
Thanks Random -- I am probably going to take down all my outgoing links to see if that helps. Hurts the reader but maybe that's it. All of my links are to good blogs and sites, no trash. I would really appreciate if some of you guys would take a look to see if anything sticks out. I am starting to think about killing this blog because of the mystery Google penalties. No one wins with that, especially not the readers.
Wait a min you don't have to take down your outgoing links just use a great magical tag No-follow. If you don't mind and if you have no problem then plz share you keywords key phrase and past traffic which use to attract visitors. You dont need to kill your blog untill you get root cause .