Lync helps you stay connected to the people who are important to you via instant messaging, email, audio and video calls, persistent chat rooms, and online meetings and presentations. If you've logged on to a computer from which you haven't used Lync you'll need to do 2 things:
This short video provides some quick tips for using Lync effectively.
Here's an even shorter video that shows the most common features you'll use. Microsoft Lync Tutorials: IMs, Calling, Video and Screen Sharing