Bring the word to others
It really shouldn't matter too much whether you do a lot or a little, some people don't have the tools needed to do everything they want all the time, I can't compost, I rent, As long as you are taking steps to help it helps...I recycle the things my community allows and I have been to several board meetings to get the waste company to do more.
I guess the biggest thing for me is like Bart, I run a site about green awareness, Some news, Articles. Mostly I like to try to get others involved. let them decide for themselves what they are concerned the most about and getting them thinking about it for their sakes not mine, I have to say honestly I get rather annoyed when someone makes a big deal out of their accomplishments and belittled others who don't...oh lets say... go vegetarian..or drive a hybrid. or they don't have a solar system not everybody thinks the same.
there are some out there who do absolutely nothing, so whatever I can do, is for me... better than simply nothing at all.