Hack:
Build sandboxes...Wait and see those castles

Not new, but simple, cost-effective, underutilized.  Spans industries, levels of work, sectors.  Think "sandbox" (nod to former mentor): Within clear constraints of quality, quantity, time, and resources, give me the responsibility to tackle my work: Ensure I understand the importance of what I'm doing, then let me apply my knowledge and skills, make decisions, and use feedback to make corrections.