1. You don't need a product - YOU are the product
2. You can post your services on a free site like blogger or weebly and have a web presence
3. You can easily offer a few free samples to build your reputation - IE you can do article writing and so you offer to write some free articles for testimonials
4. There are free scripts and resources on the web to help you do tasks. IE I have a friend who got paid to create a Twitter background which she had the option of using Gimp, but also downloaded the free trial of photoshop which gave her ample time to get her first job done and get paid
5. You decide when you can work and how much. The more you do the more you can make. You can also give yourself an increasing pay rate based on time and experience
6. You can get paid within hours of being taken on to do a job
7. You can specialize in one type of service which can be as easy as doing manual bookmarking for someone, or as complex as creating a fully blown pre-packaged websites. All these jobs have positions to fill.
8. You still reading this? Go figure out a service to offer!
Having trouble with step 8? Here's a sneaky trick. Go look in the classifieds and WSO's and see what everyone else is getting paid to do.
What? Looks like this might entail doing some work? YES!
I didn't say there was no work required, just said you can start with $0 in your pocket.