You may need to spread some expenses over several weeks. As you list a flexible expense, subtract it from the amount you have left from your income. You may find your income does not always meet all of your expenses. When this happens, you will need to look for ways to spend less. Spend time looking before you spend your money.
Some items are available free.
Use university facilities instead of expensive health clubs for exercise. Borrow books, records, and videotapes from the library rather than buying them. Keep track of the money in your wallet. Learn to say no to yourself, to salespeople, and to things you feel pressured into buying. Doing without one item can help you get something else you want more.