The paid ones:

1. Classified ads for mailing lists
When you purchase a classified ad for mailing lists, you purchase a small advertising space in someone's e-zine or newsletter. The main reason is so that when the owner of the list sends out any of his emails, your ad will be shown with it.

Classifieds in e-zines of newsletters are read more than classified ads publicly shown on websites. Therefore, they can bring much more response.

2. Solo ads for mailing lists
This is the ultimate version of classified ads. While classified ads takes away a small advertising space in an issue of a newsletter of e-zine, solo ads take up the whole issue. The ad will be mailed in a single email without any other ads together.

You can purchase classified ads or solo ads by either contacting or negotiating straight forwardly with someone/some company you know which have a huge list of subscribers. A few websites you can search for mailing lists which offers advertising spaces in their newsletter or e-zine are:
? http://www.buyselloffers.com
? http://www.mywizardads.com
? http://www.advertisetomillions.com

3. Pay-per-click
Search engines like Google, Overture, and MSN have services which allow you to advertise your ad to the right a search result page. When you advertise your ads using pay-per-click services and visitors click on the ads shown, you will need to pay a fee depending on your biddings.

4. Purchase advertising space from a website
Although this way of advertising costs a lot, it can be very useful. Purchasing a web space off a website with high traffic which can allow you to promote your text ads, text links, banners etc can drive you a lot of visitors as well.

The free ones:

5. Submitting Articles
Although writing articles and submitting them to article directories is free, you can generate very good traffic to your websites far better than the paid ones sometimes. Other than that, submitting your own articles help you build long term traffic as well.

This is the best way to generate steady, long term and huge traffic to your site. The more popular article directories are:
? http://www.ezinearticles
? http://www.goarticles.com
? http://www.articlecity.com
? http://www.ideamarketers.com
? http://www.isnare.com

6. Reciprocal Linking
This is a way of exchanging links with other websites. If your website has a decent page rank of 4 and above, or it is bringing in swarms of visitors each day, it is best that you exchange links with other high traffic websites.

7. Affiliates
If you are selling a product, having an affiliate program to let others promote it as affiliates and earn commissions is a great way of driving traffic to your site.

8. Joint ventures
This is one of the most effective ways of generating traffic. It can be done by ad-swapping, which is by endorsing each other's website to both of your own mailing lists. Subscribers who are interested will then visit the recommended sites and you will gain traffic that way.

9. Viral reports
Another proven way of bringing in enormous traffic to your websitecreating viral reports embedded with links to your website which contains good contents, and give them away to people. Other than that, you can also give free distribution rights along with your report so that others can give it away as well.

10. Participate in discussion boards
Most discussion boards or forums will allow you to have your own signature. This way, you can put down your link and get it shown every time you make a post. In order to drive traffic to your site, make sure you find a high traffic discussion board or forum to contribute in.

11. Submitting Press Releases, Stories
Similar to submitting an article, writing your press releases and submitting them to press release directories will drive great traffic to your site as well. The best place to submit your press releases is at http://www.prweb.com or http://www.prleap.com.

If you can generate fresh contents on your website, write interesting information for people, submitting it to http://digg.com can generate a huge instant buzz of traffic to your website. What's more, if it gets "dugg", which is to get voted, your stories can go to the front page where you can pull in four to five figured visitors in a day.