I can always use one of these

Memory Enhancing Spell
In my experience, the best way to enhance your memory is to have a
physical focus. So if you have a difficult test coming up—a Russian
language exam, for example—you can use a physical symbol that
represents the knowledge you seek (I used amber to boost my Russian
scores). You'll also need two blue candles to represent thought and
memory. Light the candles, and place the symbol between them to serve
as a bridge for the energy. Then say:
As each question tests my mind,
All the answers I shall find.
Set in neurons as in stone,
Governed by my will alone.
Now go study some more and wait for the spell to set. Let the candles
burn out on their own, and carry the symbol with you to the test.

by: Elizabeth Barrette
From Lady Aquarius 1962s Cauldron and Llewellyn