engine - 7:02 pm on Nov 29, 2010 (gmt 0)
One good way to find out the best hashtags is to start searching and monitoring. That will help you to see some of the people following those keywords. Start following those people, and build lists using those main keywords. Try putting the keywords into categories. eg.
red apples will go in the same category as green apples, but won't go in the same category as bananas.