When I was in elementary school, my teacher had a "ticket store". She would give out tickets for good behavior, excellent work, or if someone was helpful without prompting. Once every few weeks we were allowed to redeem the tickets for items like sticky hands, candy, or a can of soda. As I faced having my own class, I was overwhelmed by the cost it would take to keep a "store" stocked; so I came up with a much cheaper (nearly free) version. Instead of having a store full of trinkets from Oriental Trading, I have a small accordian file full of coupons. I have created posters that I display with the "price" of the coupons, and one morning a week I allow the students to trade in their tickets for coupons. It is a quick and simple process, which completely opposite from the chaotic ticket store in my youth.
This system has worked well for my classroom because the kids love the getting tickets throughout the day, and they adore buying coupons! I love that most of the coupon rewards cost little to no expense out of my pocket, and it isn't a huge fuss for the students to cash in!
One last thing... I would like to say "thank you" to Being Inspired for the free borders! Visit their TpT store at: http://www.teacherspayteachers.com/Store/Being-Inspired