Just my .02 worth...here goes...
I pick my battles. And I tend to dwell on the positive side, not the negative. Having said that, here's what I've gotten involved in.
First, my wife and I are raising our daughters to understand, appreciate, and become involved in the outdoors and all it includes. That includes hunting and fishing ethically. That includes minimal impact on wild lands. That includes knowing how to be safe.
Second, a number of years ago I became a hunter education instructor. Today's children and youth are the future of hunting. If we teach them to be safe, ethical hunters, our future stands a much better chance of being secured. As adults they will be in a position to swing the non-hunting public to our side. They may not influence more non-hunters to become hunters, instead they can get the respect and understanding of non-hunters. This matters at the poll.
Third, I support organizations that are proactive in support of hunters. I can't afford to support every organization out there, either with my time or my money, so I pick wisely. Personally, I support Backcountry Hunters and Anglers, the Rocky Mountain Bighorn Society, and the Rocky Mountain Elk Foundation.
These are the things I've done or am currently doing to make a difference. I don't expect everyone to do these, but these are examples of some POSITIVE things that can be done. We can sit all day long and identify things that we're "against", but I personally feel it's time better spent when we look for "positive" actions and then get involved to the best of our ability.
Just my .02 worth.