Coinstar has a promo that ends on the 31st that allows you to get a free $10 gift card if you cash in $40 worth of change and pick a eCertificate or gift card instead of cash.
According to the Coinstar website they have these gift cards: iTunes, Lowes, Borders, Rixty, Regal and Amazon
The Amazon one ends on the 22nd, but the rest end on the 31st.
I haven't done this so I'm not sure how long it will take to get the $10 gift card.
http://coinstar.com/us/html/Promo4050