Start your own blog.
You don't have to have your own Web site, or install blogging software, or even figure out how to set up the advertising. At Blogger you can set up a blog for free in less than five minutes without knowing a thing about web design, and Blogger even automates setting up Google AdSense so you can make money off your blog by displaying ads and getting paid when people click on the ads. To make even more money from it, set up an affiliate program (see below) for books, music, etc., and insert your affiliate links whenever you refer to those items. You'll have to get a lot of traffic to become a six-figure blogger, but pick an interesting topic, write well, tell all your friends, and you're off to a good start.
Create topical resource hubs.
Are you an expert on a particular niche topic? Can you put together an overview of the topic and assemble some of the best resources on the topic from around the web? Then you can create topical hubs and get paid through sites like Squidoo, HugPages and Google Knol. Payments are based on a combination of ad revenue and affiliate fees. You'll get higher rates doing it on your own, but these sites have a built-in supply of traffic and tools to make content creation easier.
Advertise other people's products.
If you already have a Web site or a blog, look for vendors that offer related but non-competing products and see if they have an affiliate program. Stick to familiar products and brands - they're easier to sell. To promote those products:
Place simple text or graphical ads in appropriate places on your site
Include links to purchase products you review or recommend in a blog, discussion forum or mailing list you control
Create a dedicated sales page or Web site to promote a particular product
They all work - it just depends on how much time you have to spend on it and your level of expertise with Web design and marketing.
You don't have to be a professional photographer to sell your photos for money. People are constantly in need of stock photography for websites, presentations, brochures and so on, and are willing to pay for the right image. People generally search for images on stock photography sites by keywords, not by photographer, so you have the same chance as anyone else of having your image picked. Just be careful that you don't have images of trademarked brands, copyrighted art or people's faces that are readily identifiable (unless you have a model release), but just about anything else is fair game, and I promise - you'd be amazed what people need pictures of, so don't make any assumptions. If it's a decent photo, upload it. Some sites to get you started include Fotolia, ShutterStock, Dreamstime and iStockphoto. The great thing about this is that it's truly "set it and forget it".
The above list is by no means comprehensive, but it highlights some of the new and interesting ways to make money online without investing any money, without having a product of your own, and without having expert sales and marketing skills. Most of all, unlike taking surveys or getting paid to read e-mail, the potential return on your time investment is substantial.