Foods: Probably some yoghurt draped "nature candy" & sports drinks/water.
Quests for turnin: None, heading right into Draenor!
Music: Drum & Bass, Melbourne Bounce, random EDM stuff, Rock, Metal and a few other genres.
Friends to chat with while you level? Guildies (who 50% are my IRL friends)
In-Game preps:
1x Stack of Flasks
1x Stack of Noodle Carts
Infinite Potions (STR)
Drums (25%)
Everything to level faster

Screw the dailies in IoT etc, im going to be in the frontline of questing, for the first level 90-91 i will be phasing myself over to a low population server to get a quick start in the first zone.