Kill an hour or so reading this examination on the old and new styles of corruption in Mexico, by Luis Carlos Ugalde. It's not actually that long, but I assume you'll be bouncing between that and old Youtube clips of Walter Payton and Barry Sanders, which slows the progress a bit.
Also as Aguachile mentioned, this piece from Denise Maerker on the PRI's "electoral tourism" is interesting. That is, of course, every bit as morally shady a practice as burning ballots that went to the opposition, but insofar as this imposes a steeper cost on those who would contribute to steal elections, I actually think it's an improvement. Convincing an election-swinging quantity of people to pull up stakes and move to another state is a lot trickier than just stealing the or stuffing the ballots used to be.