Metalearning means learning about learning. We perform metalearning to create a personalized plan for a Self-directed learning project (Ultralearning, after Young). Metalearning prevents us from getting lost or choosing a learning path unwisely. The more we practice meta-learning, the better we do it in subsequent projects (i.e., in gathering resources, time management, managing motivation, and building confidence).
Do metalearning by asking why, what, and how. For an example of how meta-learning was used in writing, see How James Clear used ultralearning to improve his writing.
Young, S. (2019). Ultralearning: Master Hard Skills, Outsmart the Competition, and Accelerate Your Career (Illustrated edition). Harper Business.