Facebook- This is considered to be the hugest social networking portal on the Internet. With the ability to reach millions of potential customers based on age and geographic location, Internet marketers have been cashing in on Facebook for the past couple of years.
SocialMarker.com- Social bookmarking is effective in gaining backlinks. Socialmarker.com has a list of some of the most popular social bookmarking sites based on page rank and alexa rating. You can even submit to them very quickly automatically.
Google Adwords Tool- Whether you are writing an article or creating a Google Adwords campain, Google Adwords tool is important for finding low competition keywords that get enough monthly search volume. Finding these keywords is important for getting the most traffic from the search engines.
Google Analytics- This tool is to help you figure out how much traffic you are receiving and where the traffic is coming from. Most affiliate marketers use this tool to make sure they are not being cheated out of their earnings. You can also tweak your website to see which template brings in the most traffic.
Crazy Egg Heat Maps- An effective and visible tool, Crazy Egg Heat Maps will show you where your visitors clicked on your website. This tool is a little more specific and direct than Google Analytics.
SubmitExpress Link Popularity- This is a really good backlink monitoring tool. It will show how many backlinks are appearing in the search engines for any given website.
SiteScore- This is a website analysis tool which looks at every little aspect of your website. They have a commercial version and free version.
PeelAwayAds.com- This is a cursor that sits at the edge of the page. When you click on it, it peels away to reveal your advertisement or promotion. It is less annoying than the pop-up ads.
Youtube- Video marketing is the best thing since sliced bread. Uploading a popular video and your marketing video under the same user name is a good way to gain tons of views. This method is free and effective.