For a recently memorized or reviewed page/portion, the following method can help for review:
When you pray sunnah prayers, 2 by 2 :
In the first rak’ah:
Hold a mushaf. Recite by memory, and when you get stuck, look down at the mushaf.
In the second rak’ah:
Don’t hold a mushaf. Recite the entire thing from memory now.
Note: If this isn’t working for you, you might not be memorizing/reviewing it well before the prayer.