I originally posted this at http://www.318.com/TechJournal Google is a key tool for just about every Web user these days, and it remains the most popular web search engine in use today. But many of Google’s coolest features often get overlooked. Here are some of Three18’s favorite Google tools: Google Toolbar (toolbar.google.com): Windows users can save themselves the step of navigating to Google’s homepage by adding the Google Toolbar to their Internet Explorer browser. In addition to fast access to web searches, you also get a history of your most recent searches, bars indicating relevance of your searches, and links to other Google resources. But its most welcome bonus is its…