Advertising For Free

First of all, you need a product to promote. Clickbank is a good place to start. They have numerous products to choose from. Once you have a great product to promote, it should be easy to generate an income. So, let's begin, shall we.
To advertise your business for free, we will start with the traffic exchanges and safelists. These are a good way to get traffic to your website or blog and the internet is full of them. They are all free to sign up for. Here's a few just to get you started:

(1) Traffic Hoopla (this one is my favorite and you can earn money too)
(2) Traffic Swarm
(3) Traffic G
(4) Lords Of Traffic
(5) Hit2Hit

Next we have safelists. You can set up an autoresponder to make these work to your advantage. You can get loads of free traffic if done correctly. Here's some of those also.

(1) ListJoe (This one is my favorite safelists)
(2) Global Safelist
(3) Quality Safelist
(4) Adchiever

Alright, let's move on. Another great way to advertise your work from home online business is article marketing. If you have no money to start, I recommend this method of marketing. Before you begin this strategy, you have to have a website or blog but they have so many article directories out in cyberspace. Sign up and start writing. Here's some good ones:

(1) Ezine Articles
(2) Article Base
(3) Article Rich
(4) Article Snatch
(5) Squidoo

Another way to promote is through online forums. There are no doubts that the online forum communities are plentiful but pick the ones that are popular in your niche or what every it is your promoting. Be friendly and respectful. They allow links to your blog or website. No affiliate links though. I'm not gonna post a list of these because they have different forums for different things.

Next up in our list of free advertising strategies is to submit your website to search engines and online directories. It usually takes a little while to get listed but it's really worth the effort. They have alot of search engines online but I only recommend the big ones, here's a few to give you an idea:

(1) Google (of course)
(2) Yahoo
(3) Bing

Online Classified ads is another cheap and easy way to get qualified traffic to visit your site. If you think about it, who is more qualified than someone who is willing to search through online classifieds for a specific product or service? When they run across a website, that will meet their needs, they're already primed and ready to buy. Here's couple of those

(1) Craigslist
(2) Yahoo classifieds
(3) Ads For Free

That's it! Your all set to generate an income on the internet. There are still more ways to advertise your online business that's not listed here but if you do your research, you can dominate your nich.
Best of luck!