One of the great marketing tools around today is an opt-in newsletter. The ability to email hundreds of potential customers in one go with your latest offers is something all marketers should have. A great way to build a list is to add an opt-in form on your blog. I see many threads on forums around the internet asking how this can be done so decided I would write this tutorial.
Before making any changes be sure to make back ups of your files as even the most experienced people can make mistakes when installing.
To start you will need to download and install Phplist a free newsletter script, or if your host uses fantastico you will probably find it in there.