34. Save $200 per month Eat with family for free
If you live close to your family, you could eat (and drink) with your family, parents or grandparents for free during the week (at lunch time), saves you (and your girlfriend) money on food.
Per person, $10 per day * 5 days per week * 4 weeks per month = $200 per month.
You will still have to pay for the cost of traveling to them anyways, but if you are involved with them, they may be more willing to help you out if you are ever in financial trouble, plus you dont need to do the dishes or cook.