1. Austerity means Mangal Arati, finish your 16 rounds before Mangal Arati. Listen Srimad-Bhagavatam every morning and evening, take Krishna prasadam and nothing from outside, work very-very hard for serving Krishna rest of the time, Don’t keep material desires, don’t commit offense to vaishnavas.
2. Do as much austerity that you feel as a little difficult. Don’t overdo. Instead, our austerity is to get up early in the morning and attend mangal-arati. Do whatever our authority instructs us, even if we don’t like it.