It used to be that most available markets are dominated by the big boys. They have deep pockets and are able to pay their way to get in front of buyers.
They also have brand awareness. If a buyer wants to buy a computer, he would more likely to buy from dell.com rather than a blogger.
But with niche marketing, even the little boys now can have a share of the market. With niche marketing, you target a very small market consisting of those with very targeted and specific concerns.
For example, if you want to target a market for women, you'd have to compete with many others who also provide beauty, health, fitness and other products for women.
But if you specifically target women with hair loss problems, you'd have a more specific market albeit a smaller one. With a smaller market, your chances of toppling your competition is better.
Your main concern now should be how to find this smaller market or niche market. The first consideration you should look into when finding a niche market is to find a group of people with a need.
You want to find a niche market where there are buyers. You don't want to target college students as they are notoriously always broke and you don't want to target those without credit cards to make a purchase online.
You must also find a hungry starving market that will buy your product. Imagine a man who's been out in the desert with no water. The first beverage seller would definitely make a buck from him.
You must find such a buyer. Where do you find them? There are many places you can go online to find this thirsty crowd. The following are three of the best places to go to find your niche market.
1. Forums
The first place you can go to find your niche market is to forums where people gather to discuss problems and find solutions.
Go to Google and search for "yourtopic forum" and Google will display hundreds of forums in your topic of interest.
Look at the questions most frequently asked by the members and see if you can find a solution to their problems.
2. eBay Pulse
With millions of users using eBay to buy items, this is the place you can find profitable niche markets. eBay keeps a record of popular searches and here is where you can find what is hot and selling now.
When you go to the site, you'll find at the left hand side of the page a list of the most popular searches at eBay. If you find one in your area of interest, you can pick that as your niche market.
However, if none of the items in the list is of interest to you, you can go to the Categories and look through the list. Choose a category and eBay will list the most popular searches in that category.
Another place on eBay you mustn't overlook is the Most Watched List which is located at the bottom of the page. This is the list of items that most eBay users want but are not bidding yet.
3. Amazon.com
Amazon is also another place to uncover profitable hot niche markets. Enter your topic of interest and look at the Books category. Amazon will list hundreds of books in your topic. Jot down recurring themes and the most written topic. You can choose one of them to be the niche market to target.
Finding any niche market isn't enough. Any topic you can think of can be your niche market. But you must make sure that the niche market you've selected is profitable. Find the most profitable niche market from forums, eBay Pulse and Amazon.com and you'll make money with your niche market.

Comments
thank you once again for the information
Try to find niche forums at 1topix. Just google it. There are more than 5,300 forum links which can be sorted by language, number of posts/ members.
An information about Alexa rank, google PR is available . As well, the list of categories retrieved from a forum will help you to get a clue about its content.