What to do when you are cash-straped?

Being a student, all i ever want is to focus on my studies and forget all about other issues. I hate it when i have to constantly crack my brains to try to keep my expenses controlled and in order. And by this, I dont mean having to control my shopping sprees and whatnot. What I mean is having to always, always make sure I have money to survive. You see, my allowance for every month is $300. Well, this would not be a problem IF MY DAD DID GIVE THE MONEY TO ME ON TIME. What he does is to put like maybe $20 every 5 days? tell me, how is that even insanely possible to survive uni life? Today alone I had to fork out $60 for my coursepacks and textbooks, and I have to fork out another $70 or so for the remaining books. And to top it all, I have to think about my outrageous hp bills, internet bills, laptop instalments, bus concession, and food. I wouldnt have to whine and complain if he puts the $$ in my account on time, then it would be easier to divide my money and monitor my expenses. Now, with money delayed or random inputs into my bank, how am I to do that. And this put alot of stress on me. Not only I have to think about my revision and studies, I also have to think about money. And Im so bloody tired of all that. At times, I feel like its better to just quit the fucking school, but I really want to study. Its my lifelong dream to have a degree, hell even a masters. And im freaking pissed that this money issue is the one hindering me to get to get to my dream. I'm really tired having to think about money all the time, when I should put all my energy on my studies instead. Fuck this.