One way to learn is to see what other people have done. You learn from both successes and failures. Here are stories of three successful efforts at using social media to promote events or appearances at tradeshows.

Check out these three short videos.

Let’s start with Portland, Oregon’s gDiapers – maker of eco-friendly kid pants:

And then move on to a US company called Relevansi that managed a multi-country, duo-hemisphere event long distance:

Finally to Criterion, a company in the manufacturing sector that used social media to get more leads and attention at a tradeshow: