The Chasam Sofer zt’l writes in the name of the Shev Yaakov that whoever studies Torah on Purim night (between the two megillah readings) is guaranteed to be a ben Olam HaBa. 

It is also an auspicious time for tefillah.  

There are many who recited the entire Tehillim and saw yeshuos gedolos!

~ R’ Elimelech Biderman