If say your visitor is worth $0.10....if can find some decent positions in most keywords for less than that!
If you target your traffic and use [exact phrase] you can get a half decent click percentage above the needed 1% and also generate targeted traffic.
Start small and limit your campaign to 5$ per day and see how it goes.
In my opinion it has been worth it but dont give up and read the 'Adwords' forum for some valuble ideas.
I would say give it a try for a month or two and see how it works. You can learn a lot just by looking over this forum and save yourself some hard learning experiences.
Just give it a shot!
[webmasterworld.com...]
The first thing I would say is decide what you are "selling" be it literally selling widgets or just trying to pass on information. Sy for example you sell "brandx widgets". The most obvious keyword is Widget and widgets. These will work well if there is not a lot of competition, but if there is you will either have to bid high or have a very compelling ad, or both. You might be better off going with "red widgets", "professional widgets", or "brandx widgets" which may not have as many people competing for the terms and may more accurately describe your products.