Google Suggest Beta
As you type words into the search box, Google drops down a list of what it thinks you want to search for based on previous searches and shows you how many search results are available for each phrase
Google Desktop Search
Let Google index your desktop computer and let you search all the documents that are locally stored on your computer. (Google will probably be the best some day, but for now, Copernic Desktop Search seems to work better. Get it at http://www.copernic.com/en/products/desktop-search/index.html)
Use Google alerts to get a daily email of new sites and updated pages on the internet indexed by Google based on keywords that you chose.
Create a profile and have all your Google searches tailored to your profile preferences.
Search Google from your cell phone.
Search academic literature including peer reviewed papers in journals.