This recitation can be done any time the moon is waxing, but it is most effective during a full moon.  Make sure you’re outside (or, if you can’t go outside, make sure you can see the moon from a window).  Look up at the moon and recite the following three times:

Lovely Lady of the Moon, bring to me your
wealth right soon. Fill my hands with silver
and gold. All you give, my purse can hold.