The information in the center is difficult to read because it seems to be squished. What I would suggest would be to take out the right side nav where you have the "100 Creative Presentations Ideas" and move it over the below the left navigation. In regards to the background color of the left nav, try a lighter blue. The yellow contrasts too much with the blue header.

I think by taking out the right nav the site will balance better. Regards, Dave

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I'm an artist that has taken my creative talents to online development.
www.CommanderDave.com