It is well known that the power of tefillah on Purim is perhaps greater than on any other day throughout the year. 

However, the Ateres Tzvi zt”l taught that a person could accomplish even more with his tefillos on Shushan Purim than on Purim day.

Today is Shushan Purim.  Don’t waste this opportunity.  Ask Hashem for anything and be confident that He will answer your prayers.