I just came across this You Tube video':
A nice, fairly short (21:57) look at the key aspects of Lync and online meetings. The vide covers scheduling online meetings, sharing meeting content, managing audio and video connections, and collaborating with attendees.
This video is one in a set of videos at http://www.youtube.com/channel/UCIw0RsfVMVWdxf0NezkxmKA?feature=watch which look at how to get the most from the Lync Client.
If you are rolling out Lync, you might take a look at these videos as the basis for end user on-demand self-training.