Your site Is well organised and tidy and has a lot of nifty ideas. However there is'nt much variations in colour maybe you could present a few brighter colours similar to the header in the left hand corner.

On the promotion side, you might need to embed your ads more and intergrate them into your content. Find out what your target audience is and advertise and promote there, get to know your visitors perhaps even create a blog and become more personal.

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