I have written before about the importance of using the Google Webmaster tools for your blog and below you will find two instructional articles. A great way to keep up to date with what Google is doing for webmasters, is their webmaster blog and their webmaster help section.
Google Webmaster Blog
The google webmaster blog can be found here. To follow the latest goings on as well as what is on their mind, this blog is a must read to either bookmark, subscribe to RSS in a reader or via email. If they add something, remove something, explain something, you will want to know as it could effect your search engine rankings and indexing. There is a wealth of information there, the writing is excellent, easy to follow and very informative. When looking to determine how to use a tool of theirs, or what it means check there first.
Google Webmaster Help
Another great place to check when you have a question or are looking for an explanation is their webmaster help section. You can search through their help guides. You can also search in the forums where you are likely to find a similar question to yours and an answer. If not, then you may submit your own question. These forums are extremely helpful.
Here are two articles I have written in the past with step by step instructions on how to set particular Google Webmaster tools: