Conservation science often addresses highly complex issues; creative approaches can help develop new ways of doing so. We describe constraint-based brainstorming, a 10-minute creativity-inducing exercise inspired by design thinking. Although we applied the method with the goal of developing creative environmental valuation methods, it is applicable to almost any complex, interdisciplinary environmental research problem. We tried the approach at two academic workshops, in Japan and in Germany. We generated, in each short activity, scores of unique ideas for the target question. We present this engaging activity as a way to simultaneously achieve multiple outcomes that can support innovative conservation science: quickly generate many seeds of ideas to address a challenge or goal, offer insight into nuances of and shared convictions related to the topic at hand, set a tone of creativity and breaking outside of established thought structures, and build community around a willingness to take risks and freely share ideas.