I'm beginning to suspect I might be a victim of the duplicate content penalty (google). My website has a very consistent design which is repeated throughout, leaving on each page: Site layout > Unique content The design is pretty recent so I don't fancy a major overhaul. Can anyone suggest something to cut down the dup content? Here is the link: http://www.turkeyrenting.com
Why? I think the site's fine, although your html files are a bit big compared to the actual text within them which won't help SEO efforts. To start with you can move all the javascript to external .js files. On the longer term you could move the table based layout to css.
I've been reading a bit about the dup penalty and realised that a large proportion of the content on my page is made up of the design elements, links etc. Then, while Yahoo gives me respectable rankings, MSN is clinging to me like a dog in heat (a 4-page turkish language section made last week ranks #5 for 'learn turkish'!) Google toys with me making me rank #150 or nowhere on alternating days for a popular search phrase and periodically refuses my site exists (dc 216.239.37.104 showing 0 links, 0 rankings for any keyword). Perhaps I'm looking for a witch to burn and the dup penalty seems appropriate.
First, it's a duplicate filter, rather than a penalty. If it were affecting your site, what you would see is one of the pages indexed and the duplicate page nowhere in the index, not at #150 or anywhere else, and it wouldn't be coming and going like that. I suspect you just have a page that doesn't rank very well in Google at the moment.
If duplication in the HTML is a problem most content management systems would upset it - they tend to use templates and recurring sections.
Google usually takes longer on new sites - unless you have very high quality inbound links. I see you registered your domain less then half a year ago so it is my expectation you will see your rankings improve the coming months. I am certainly no expert SEO though