Another superb example of video. This has a very compelling call to action.
I've very recently been exposed to the concept of 'bite sized acts of solidarity' a much better term than 'slacktivism'.
Bite sized acts of solidarity are the actions we should be looking to inspire our supporters to take as often as we can.
An action however small requires some level of thought, we need to get people thinking about the things that are wrong more often.
I found this video on the Osocio web site. Which is one of the best resources on the web.