For those of you who are new to Google AdWords, there is a free workbook that will help you get started using the AdWords interface and creating pay per click advertising campaigns. The free downloadable pdf file is a bit lengthy, but provides some great insight into the basic steps of using AdWords.
The main topics covered in the workbook are organizing campaigns, picking the right keywords, writing targeted ads, and putting it all together. Each topic is complete with definitions, tips, and screen shots.
The workbook is by no means your answer to getting the most out of your advertising, but it is a good way to get started if you have a small budget and are doing things on your own. For a more in depth strategic guide to online marketing, try the Ten Golden Rules of Online Marketing Book.