World of Warcraft: Preparation Guide

What you need to do to prepare for World of Warcraft: Shadowlands. 

Sort out how many characters you are going to play / level.  Park your character outside either Grommash Hold (Horde) or Stormwind (Alliance) to start the Through a Shattered Sky questline.   Here is a link to the questline at WoWhead.  Equip 5% and 3% move speed gems. Equip Light-Step Hoofplates for 20% increased mount speed.  Grab 80-100 Goblin Gliders.  You will use these primarily in the Maw. Grab 2 or 3 Draught of Ten Lands for a 10% experience bonus up to 51.  Getting ahead of the crowd will save you time later.  Clean out your bank and bags.   Enable Warmode for the 10% experience increase.  Grab 40+ flasks.   Grab 120+ HP potions.   Grab speed and dps food. 

You're good to go!