This document discusses speculative design and its use in preparing for future challenges. Speculative design imagines possible futures and debates their implications before they happen. It operates on an intellectual level by placing new technologies in imaginary everyday situations. Speculative design can manifest possibilities and facilitate more desirable futures. It triggers designers to think in new environments and systems. Speculative design is presented as an attitude that can be introduced in standard design processes. Examples are given of speculative design projects like DIY surgical robots and designing for an overpopulated planet. The document advocates joining a meetup group to get involved in speculative design.