The following chapter explores creativity techniques for sustainable product development, framing solution-finding as the interplay of analysis and synthesis under technical, regulatory, economic, temporal, and sustainability constraints. Design Thinking is introduced as an iterative scaffold (understand, observe, define, ideate, prototype, test) that structures problem exploration rather than prescribing a full process. The chapter first addresses literature-search methods in the digital age: selecting platforms, crafting keywords, applying snowballing, and evaluating sources via FAIR principles. AI-supported research tools enhance discovery, summarization, and mapping but raise issues of data quality, ethics, and intellectual property. Intuitive, team-based ideation methods include checklists aligning requirements with sustainability, brainstorming and brainwriting for unconstrained idea generation, Method 635 for structured iteration, and the 6 Hats Method for diverse cognitive perspectives. Bionics serves as analogy-building from nature to technology, exemplified by additively manufactured implant surfaces and topology-optimized components that reduce material use while enhancing function. Discursive methods then structure creative output: morphological analysis decomposes problems into parameters and manifestations, recombining them in a morphological box to generate coherent concepts. Design catalogues, structured repositories of verified solutions, support knowledge reuse and innovation. Together, intuitive, discursive, and AI-augmented methods form a complementary toolkit for creative yet systematic progress toward sustainable design.