I like the idea of small goals, actions or games to encourage sustainability. Keeping the goals small makes them more appealing to people who might not otherwise have considered trying it.

I created 2 sustainability challenges at YouSustain:

Both of these are easy to complete and many of my coworkers and friends have joined up. It’s been fun to have a common goal this week.

You can also see the full list of sustainability challenges on YouSustain.