• choose 'Brainstorming' at step 1 box in the "Search It" window,
• choose 'overture suggestion' at step 2 box
• type 'car' (without quote) at step 3 box
• click 'Search It!'
  
  
  button (you may notice that there is step 4, but you don't need to fill it at this stage. If you try write something the program will tell you that you don't need to choose at this time.)
• then a leading page will be open, which explains the technique you are using. Click 'Please .....results.' link to see the result.
• the resulting page looks something like,
  Count SearchTerm
  3467549 car
  1914166 car insurance
• You see the number in Count column? That's the demand of the keyword.
• You also notice that other search terms are shown in the result page. Save this keywords and count somewhere, in case you have to refer it later.

• For this end, you don't need any other tools. Just go to Google, Yahoo or whatever search engine you like and type car in the search box.
• Look upper right bar of the search result page and you can find something like "Results 1 - 10 of about 301,000,000 for ''car". The number '301,000,000' is the approximated number of supply. For sure, not all of them are blog, but realize that if you talk about car you're just 1 out of 301,000,000. This means that you may not pick up "car" as your keyword and choose other topic if you want many visitors to find your blog from the search engine. This is why you need to save above demand table somewhere.
• Now that you know the topic "car" is too competitive, the next thing you can do is to find the number of supply for other keywords from the table you saved. Continue this step until you find less competitive keywords.

• Use Search It to find reasonable demand of the keyword related to your blog.
• Check the number of supply from a search engine, for example, Google.
• Choose the keywords that have high demand and low supply.
• Finally use that keyword in your blog repeatedly with the frequency of a bit more than your high school English teacher would tell you.

ABOUT THE AUTHOR
Ryen Kim is an MBA, specialized in marketing research and analysis. His current focus is blogging and home based affiliate business as a work-at-home scheme. He is a founder of Blog Sites and running Hom Based Affiliate Business web site.