I found a great blog called justanotherhangup. Suzanne has some great ideas and if you ask nicely she will send you free subway art printout.
This is the Thanksgiving one I have done so far. I just asked for her December one and will be putting that together..
I went to Joann's and found the 7x7 precut wood plaque and then painted it orange. When I printed out the art onto cream cardstock, I took ink and distressed the paper. The pumpkin came from Targets $ section.