How do we best tackle global warming?

There is much talk about the climate change and since the risk of doing something about it even if these warnings are exaggerated seems to be smaller than the risk of not doing anything at all, we should proceed… to do what? It would truly be a shame if and when the world finally gets it will together, that it would then only end up doing useless things. How can we make sure to get the objective information that keeps us from falling into the traps of the so many peddlers of green magic potions?