Adults who are trying to be creative face a lot of creative roadblocks along the way: there are rules about what's allowed and what isn't, how we're supposed to behave and not behave. Those rules are there for a reason (we're not saying they're bad), but they can inhibit your creativity. Instead, use all the natural intelligence you've gained as an adult and where possible, act like a kid. Maintain the wonder you had as a child, and look at every person you meet or every tree you see as endlessly fascinating.