For me, I'm making adaptations to my lifestyle now anticipating what will be necessary in the long-term. This way, myself or my children will not be in shock as society adapts.
So far, I'm shopping locally as much as possible. Eliminating trips > 10 miles by car and using metro/bus/bike instead. I'm trying to eliminate one time use packaging where possible and reusing things rather than throwing them away. These are small steps and gradual changes. The main question I keep asking myself is, what would the world be like if 6 billion other people made the same choices.