Congrats on nursing school! Good luck in your studies.
Buying drinks at work or anywhere else during the day is very expensive.
If you need a drink at work, bring it with you to work/school. Hot Coffee or tea in a thermos, Soda purchased at the store in 6, 12, 24 packs of cans is much cheaper than buying from a vending machine. Drink tap water, fill your own bottles with water at home and bring them along. Hopefully, you have a fridge available to you at work and at school.
Bring your lunch to work with you.
If you smoke, quit. Easier said than done, but that will put a lot of $ back in your pocket.
Cut back on cable tv - get the basic package. You'll be studying in your free time anyway! When you can afford it, you can upgrade.
If you have a cell phone and a land line phone, get rid of the land line and use only your cell.