As the competition increases in the Pay for click space you need every edge possible, long gone are the days of set it and forget it. I find myself tweaking my adword campaign and budget every 3-4 months, sometimes I increase my bids, sometimes I target more keyword or less keywords.
Recently I found this tool call Spyfu that offers a free peek at your competitors keywords and budget as well a nice compare all for free and if you need some extra keywords and tools then they have a professional subscription plan as well. I know I been able to target my keywords and increases my clicks thanks to SpyFu.
Full disclosure, I will be paid a referral fee if you sign up with then for a paid plan, but I promise you that I only recommend tools that I find to be of use and offer a free version as well.
Check out this chart for free and this is just some of the interesting data.
Get the Google Adword Edge
