This has always been a great question, and there are many different schools of thought on this subject.
#5: Freelance writing services, or create a blog. Writing can be an interesting and rewarding way to make money online. You can publish and sell eBooks, blog posts can generate revenue from ads or affiliate links, sponsors, or you can write about your current products for sale.
A person could argue products like software, eBooks, and virtual information are amongst the most marketable as they are easy to duplicate and have no shipping costs. It’s true a virtual product can absolutely simplify your post-sale process, however are they truly the best overall product strategy? In my opinion it all comes down to the demand, then the numbers. Calculate what price you can create or retain a product for and then calculate what price you can sell it for while keeping in mind advertising, shipping, and other expenses that fall between those two processes.
5 Products you can sell and make money!
Find out what the #1 method is: http://EzineArticles.com/9653733