My suggestion is to go by size of impact:
Rent may be your biggest spend, so focus on this first. However, do not move too far away as it takes away from your time.
Food can be expensive if you are buying out and using delivery. Buy food in bulk and prep once a week to save time and money.
Ride a bike is good if you are spending too much money on transportation. However, it is dangerous in NYC. Use the subway instead of cabs or Uber. Biking sometimes can also be healthy but be careful!
Compare Student loans vs. your other costs - if the rate is low, then it is ok to defer.