Money that came out from no where.. the scholarship from heaven?

I am a real broke kid few days ago(spent too much on records and shoes), until yesterday.. i got extra $700 in my account that came out from no where! and i double checked today theres no transaction recorded in my account. I think the first thing normally people will do when they realize they have extra money in their account is withdraw all the cash!! I never had this much cash notes since a while! LOL

so... if i could spend that money how should i spend it...? i think ill just keep it for surviving this few months