6.1 Knowing about knowing (declarative metamemory) involves introspective knowledge of memory, awareness of what is known and not known and is influenced by development and task experiences.
6.2 Knowing about knowing involves beliefs and deliberate planning which influence and facilitate strategy selection and application.
6.4 Knowing how to know (procedural metamemory) involves the implicit or explicit application of mnemonic strategies, systems and plans needed for purposeful memorisation or learning.
6.5 Knowing how to know relies upon self-knowledge and awareness to facilitate monitoring in memory and problem solving tasks.
See other related assertions on page 84 in the book The Taxonomy of Metacognition.