store has any sales, use apps like shopkick. it rewards shoppers for simply walking into retailers like target. >> it's $2 off any bed pillow. redeem our kicks at checkout. >> we have 1,811 to redeem. >> total is down to $42.13. knocking our bill down 20%. and finally, tip number two, if you are living on campus, consider leaving your car at home. on average college students save $200 a month on gas alone. in all, saving the average college family $2,900 a year. and our expert says never buy new textbooks. instead consider buying used or renting on sites like amazon. you can even find free versions online at boundless.com. it is a huge expense for college students who spend an average of $1,200 every year on the textbooks. paula faris, abc news, new york. >> textbooks were nuts.