One of the most important decisions you’ll have to make as you decide to build the list is which niche you should focus on. This is one of those questions where there is not one right answer - there are literally thousands of niches to choose from.

You might have some idea of which niche you want to focus on if you have built up websites in that niche already. Most people don’t have any idea what to choose in the beginning so don’t worry! Finding a niche is not that difficult if you follow the right guidelines.

Look for a hungry and/or a passionate market. This works well if people have some kind of problem they are desperate to stall. Finding people who are passionate about their hobbies can work very well also.

When selecting a niche, make sure people are already spending money in that niche. Look for physical products or digital products being sold regularly to this group of people. This is usually a good indicator that you can make some money as well. Another place to check is advertisements on TV or in magazines. Where there are ads, there is money being made!

Basically, you need to make sure you have something to offer a group of people. You also want to make sure the customer base will be large enough to make your efforts worth your while.

If you cannot think of a niche, you just need to brainstorm and work your way from there. You can go to Amazon.com, magazines.com, 43things.com, Yahoo Answers, and many other sites to get some good ideas. Write down anything that comes to mind or stands out to you as a potentially profitable niche to build a list in. Then, you can narrow your choices until you have some good options. Some further research should help you make your final decision.

Of course, as an Internet marketer you are not limited to choosing just one niche. When you have developed profitable relationships with customers of one niche, add another to your business. That way, you are not dependent on a certain group of people for your income. To make sure your business always stays viable, spread out your assets in this way.

Remember — never take the decision of which niche to choose lightly. Choosing the wrong one could mean you hardly make any money at all, and choosing the right niche could mean you make some life-changing income!