I see people talking a lot about wanting to go back and replay their favorite parts but they don't feel like playing the whole episode through to get to it.
Why not just copy your first save into your last slot and rewind to your favorite parts?
I copy my first save into my save slot #6 and then just rewind to my favorite parts or to see Easter eggs like when Duck turns into a walker and kills everyone on the train. then when I want to replay a new part I just copy it into the save slot again and replay.
Also I believe I should say you can get more save slots on the Xbox version using a flashdrive. Just plug it into your Xbox and optimize it for Xbox storage.