Try cutting unnecessary expenses.
Do you drink soda? 2 cans a day is more than a 12 pack a week. Stop the soda, that's $4 a week.
Do you smoke? 1 pack a day is more than $20/week MIN, with taxes it's more than $40 where I live.
Do you drink alcohol, do you use recreational drugs, do you buy lots of video games ETCETCETC. Look for the fat that can be trimmed, most people don't realize how much they spend on little things because they're only paying maybe 5 dollars at a time, but it really adds up.
Good luck.