I use google's keyword tool most of the time. Make sure you uncheck the broad match checkbox and check the exact checkbox whenever you're doing keyword research. You can waste a great deal of time if you don't!
Have a think about products and services that produce high returns e.g. mortgages, lawyer services, credit cards, high tech products.
Get a good list of ideas together and try out some keywords in the tool to see what the CPC is, plus traffic levels.
- Remember that even if you are Number 1 in the search results for a particular term you'll most likely only get 50% of the traffic.
- Usually only 1 or 2 people per 100 visitors will click an ad.
- Also remember that ads on the display network are usually a lot cheaper than those on the search network so you're unlikely to get the highest amount shown for a click.
- In fact you will only ever get 68% of the click value as that is the proportion google pays to advertisers.
- Check out the competing websites that are currently ranking on page 1 for that *particular phrase* to see if they're actually beatable. (In most cases, any phrase with a high CPC has heaps of competition and would take years and a great deal of money to beat).
- If you're lucky enough to find a phrase with beatable competition set to work on creating the very best possible page on that query.
- You may want to experiment with turning off interest based ads (those annoying ads that follow us around) so that your content shows content based ads (the actual ads you have built the page for).
- If you have found a low comp high return phrase have a look around for a suitable affiliate program that would add value for your visitors. Much more money can be made from a good affiliate program than ad clicks.
Here's a good hub on the topic of good keyword research that explains it all in far more depth >> http://hubpages.com/business/Keyword-tips-Money-ma...