Sometimes I think that's all you need...
I watched scores of concertgoers at Lollapalooza walking around with clear plastic bags, gathering recyclable cups and cans all weekend long. The same thing occurred with cups at Pitchfork Music Festival. Best case scenario is everyone taking responsibility for disposing of their own items properly... but incentivized recycling clearly helps the monumental task of waste management at big festivals like this. I talked to a girl named Jessica, weighed down by about 30 gallons of recyclables in her bag, with a friend helping her fill it. When I asked her why she was doing it, her simple reply was, "It's easy!"
I couldn't agree with her more.