Google sets is not too well known but can be a fast and easy way to come up with ideas. 
Go try it now. For instance enter “diet, weight loss, lose weight” into 3 of the fields. Hit the “Large Set” button and check out the results. This can give you ideas for niches or adgroups that you might not otherwise have considered.
Have you ever used this tool before? What valuable uses can you think of for it? Your comments are welcome.
Have a nice day!
Danger
So is this just another tool for keyword ideas? Or are you looking for ads within the keyword search result for ideas?
Thanks!
hanji