clipped from: www.maximumpc.com Chances are you know what Gmail is and have been using it for quite some time, even if Google’s service is technically still in beta. But did you know that Gmail can be used for many other practical functions other than sending and receiving e-mail? With the appropriate extensions and setting hacks, you can make Gmail do things that other web-based e-mail services and even some desktop clients cannot. In this guide, we will show you how to implement the ten hidden features you need to know about Gmail and introduce you to five of our favorite Gmail Labs add-ons. You may already know or use some of these features, but there are sure to be a few in here that you do not.