annej - 11:24 pm on Dec 2, 2006 (gmt 0)
I just noticed you have Amazon. See if you can find books or equipment related to your individual articles or topics. Then put a picture of the book or item right in your left column or embedded in your text with the your link to the Amazon item. People need to see the item right there on the topic page. Impulse buying. I find I sell much more that way than I do through my separate store.