Make a poster from your favorite beach photo, or purchase a beach poster (or any outdoor theme you prefer) then frame it with an re-cycled window frame. Makes it appear that you are looking out a window. Love this clever idea!
Industrial furniture, such as old post office cabinets and hotel mail slots, is easier to come by than you might expect. The downside with these pieces is that if they are in good condition, (and often even when they are not) they fall on the pricier side of the thrift-store scale.