Google Adwords is on the menu again today and rightly so as it is important to know what you are doing to avoid the frustration of spending money with no returns.
Another tip on Adwords is to run two separate ad groups one for the search network and one for the content network, the reason being is that your CTR for the content network will be extremely low which in turn will ruin your search network CTR.
Also make sure you keep your keyword groups very tight,