Sometimes you don't know where you will find another interesting article. In this instance, I was looking at the post "Selling Photos Online" and simply looked deeper in the web pages of the iStockphoto.com, which allows you to sell photos online. But to my surprise, there were articles to read. And one of them is called "Cheap Tricks":

...for those of us who have a long way to go before we quit our day jobs and rent studio space, inexpensive alternatives to high-end equipment are a necessity. Here are just a few tips to make a $3 image look like a million bucks-- each one under $20. Many readers are sure to be familiar with a good deal of these techniques and items, but hopefully you will come away with at least one or two ideas to jumpstart your setup.