Do you make crafts? You might be able to sell them online (etsy is popular) Otherwise, you could ask places like gas stations or diners to leave jars for donations, or try to push some sweets on your friends for a slightly higher than buying price- let them know the extra charge is for a good cause! Also an ad in the local paper might be just the thing. Hope this helped.
p.s. super cute avatar by the way. ^-^