Answer: On the floor
As mentioned early on in the film, Linda is a poetry teacher. Apparently, she writes Dave a poem, which he obviously doesn't care too much for, and tosses on the floor. Before Dave and Buddy leave for Boston, Buddy comes down to meet Linda, and he surprises her by reciting the poem she wrote for Dave. She asks him where he found it, and he replies that he found it on Dave's floor, crumpled up behind the sports pages. She is obviously crushed to learn that Dave hasn't appreciated it, and she thanks Buddy for "rescuing it from the floor".