Ok, some people get confused, overwhelmed or get buried deep when doing a market research or keyword research. Sometimes you will end up having too many keywords to try and because adwords costs money, you may end up losing a lot in a very short time. This method will help newbies who dont have enough experience in market research or dont have a clue about where to start. You can use this technique to increase your buying keywords, find rich people who dont care about the price, cresit cards pulled out on the table and all you need is the basic good old free google keywors tool. One of the basic ways of gathering the buying keywords is using "the best" keyword query and then compare.People who are not on a budget will be looking for one thing. The best. Whether it is the best car or the best vga card or the best method, etc. Of course this is not our keyword, this is just our starting point. People use this to find out which product it is and so that they can gather information and compare it with the other most popular brand. Try it yourself. Search for the best video card and you will end up finding two products that are rival (like ps3 and 360). Then you can put the specific model/product name in keyword tool and see the monthly search rate and gather some long tail keywords. Make sure you add "buy" keyword in your ad copy so that you can eliminate people who are looking for information. This always help me discover the most popular products that i am not familiar with and it saves me a lot of time. Especially when i want to promote stuff that i have no clue about. For instance, gilbert 800 barbeque grill. Hope this helps.