The Walking Dead is back this Sunday! And even though this will be the fourth season for the series, have you noticed how the characters seem to be making the same mistakes over, and over . . . and over again? With that in mind, we compiled a few lessons they should've learned by now, if they want to survive postapocalypse. Check it out in this POPSUGAR Rush, and then tell us if you'll be watching as Rick, Michonne, and the rest of the gang return.