How Do You Remember the Scripture You've Memorized?

Piper talks about memorizing scripture: How Do You Remember the Scripture You've Memorized?:

A practical thing I would suggest for people to do, is decide what cluster of text they want to always be at their disposal. For me I could name Psalm 46, Psalm 23, Psalm 1, Romans 8, 2 Corinthians 5:21, a cluster of texts surrounding justification, 1 Peter 4:11—'let him who serves serve in the strength that God supplies, that in everything God may get the glory through Jesus Christ, to whom belongs the dominion forever.