Look at the talents you possess that can give you a boost. When you are asking a favor from someone, it helps to have something to give in return. For example, you might try asking neighbors if they can donate to your college fund in return for teaching their children how to play an instrument. Leave the donation amount up to the individual rather than setting an exact price.
Put out a sign asking for college money while playing an instrument or performing in a public location. You do not need to ask anyone you know personally. Instead, take your talents to the street or a park and offer a performance to anyone passing by. If you have an interesting talent to showcase, whether it is singing, dancing to a radio or even magic tricks, people might pay you for the surprising entertainment.
Ask your closest relatives in a letter explaining how much you need to raise to finish paying for college. Detail your needs exactly; telling about the scholarships, grants and loans you've taken already will show that you're doing what you can to pay for it personally. Ask grandparents for a donation to your college payment or ask aunts, uncles or even older siblings who've already graduated. They might or might not give money, but you'll never know if you never ask in the first place.