Is there something that would make the behavior change you are promoting into something fun, easy popular, etc.?

If you were in charge, what would be the behavioral change that promotes environmental health that would be your first focus? Some examples might be reducing energy usage, bicycling or using other friendlier ways of commuting, or changing dietary habits (these are just some examples-do of not feeling constrained by these or even the need to use one of these). How would you go about effecting change? Remember that most people are not like you and are not actively involved in understanding environmental public health. What about a social marketing strategy for your behavior change? Is there something that would make the behavior change you are promoting into something fun, easy popular, etc.?