Becoming an Expert at Word 2007!

I have been using Word since I was a small child. However, through my experience with Word, I never really knew how to use it in depth. I knew how to work the basic features that I needed to write a paper, but I did not understand how to use any special features. Now, with the new version of Word 2007, I am not very comfortable with it. It will often take me a minute to search through each tab to find "spell check" or other applications I might be looking for. I want to become more familiar with the location of the basic features, as well as the special features. Knowing how to use Word in depth could really help me throughout college as well in my life after college. I want to become an expert at Word 2007, and with this class I believe I can.