Save it.
No, seriously. This decision will affect how you handle money for the rest of your life.
Saving is what you do when you have a steady income
No, it's what you do all the time. My income is NOT steady, but it's no big deal, because I save.
The result? Some $1k tool shows up on ebay that I happen to need and it's a killer price. Bought it right there, because the money was saved.
Friend asks me to be best man at his wedding? No problem, I have the funds ready to go.
It's expensive to be poor. Examples are all around (pay for 1 year of car insurance in a lump sum, any form of interest, even food purchases).
If you spent what you bring in you will always be held hostage by your paycheck for the rest of your life.