IDEA: Make a website about something you love or know alot about. Once it is all done, try to get it into any search engines you can for free. If it is an informative site Yahoo will usually consider including it in it's directory. Look for websites that are similar and request their owners to exchange links with you. Exchanging links will give you a better listing position in some search engines, like Google.

Sign up for Google AdSense account. Choose an ad type you want and place the code on your website. Google robots will crawl through and match up the ads to your site's content. If someone clicks on the ads, you get paid.

It may take a while for your site to start getting a sugnificant amount of visitors, so just sit back and let it do it's thing. Maybe even start another site.

My website www.mirru.com started 4 years ago, right now I am getting about 2000 hits. Making about $100 per month. That's without me doing anything really. Create 20 of these and you've got $2000 per month income.