How to Find the Best Keywords For Your Blog, Website or Article

1. Write down a list of topics you are knowledgeable about. Even if you don't think that skill or knowledge you possess about a particular subject will be profitable, write it down anyway: you'd be surprised to find how many niche topics are in fact huge money-makers.
2. Go to Google Adword's Keyword Tool. You can find a link to it in the resources. Enter your keyword into the box and hit 'Get keyword ideas'.

3. Typically, a long list of keywords will populate. You're going to want to display three columns; everything else you can hide. Using the drop-down menu, make sure that 'Estimated Avg. CPC', 'Advertiser Competition' and 'Global Monthly Search Volume' are all displayed.
4. Click on 'Estimated Avg. CPC'. It will organize the list by highest earning CPC. CPC stands for 'cost-per-click'. By sorting the list by CPC, you can gain a general idea of how much each word is typically worth: i.e. how much the ads listed on your article or website will earn you per advertisement clicked. (Granted, Google and eHow both take a percentage of that money, so you won't exactly get the full amount shown.)
5. Review your keyword's advertiser competition. To do this, simply mouseover the green/teal bar next to your keyword, and a ranking will pop up. The rankings can vary from 'no advertiser competition' all the way to 'very high advertiser competition'. The best keywords are those who are rated as having anything at or above a high advertiser competition. This means that lots of advertisers are competing for this word, meaning that you will typically have a wealth of high-earning, related ads displayed on your article, website or blog.
6. Lastly, take heed of the global monthly search volume. This will give you some idea of how often people are searching for your word. While many people speak of the importance of making money off of 'niche' topics, don't be afraid of a high search volume: if you advertise your article or website and do proper SEO, you can get to the top of the search engines and -- if you have quality information -- beat out the competition, thus gaining the majority of those ad clicks for yourself. At the same time, however, a high-earning niche topic can definitely be the way to go. At this point, you'd want to size up your competition to decide what is the best route to take.
7. Implement your chosen keywords into your article, website or blog, making sure not to 'over-stuff' them. Whenever using keywords, also make sure that your writing still sounds natural, so as not to alienate readers: it's useless to spend all that time researching keywords only to have no one take the time to read what you've written.