My CPC is set between 5 and 20 cents. The items I am selling are popular.
I could use a little hint as to what is most useful for me to change here. Are these figures about normal, or well under-performing? THe CTR at the moment is 0.6%, but most of the clicks is on the more general keywords.
In my experience I have found that changing the way the ad is worded can dramatically increase the CTR from the impressions.
Also have a think about where on the site the ad takes them. Changing the page on your site where they 'land' can make a lot of difference to the conversion rate.
It is a matter of trial and error. Try some searches around the keyword you are targetting and see what comes up for example.
One thing I have learnt is it is not always best to pay on the most obvious keywords. They often generate alot of clicks, and cost, but do not convert well. Drop the obvious and go for more specific.
ie do not use 'widgets' but go for something like 'uk blue widgets' The number of impressions will be lower but you are now exactly what the clicker is looking for . Therefore the CTR will be high and so should the conversion rate.
Good luck.