Garrisons:
- Each player has a Garrison
- Garrisons are built by getting plans, and spending gold on upgrades
- You can collect 'followers', which are essentially character sheets with their level, iLvl, and traits. You can send them off on missions by interacting with the mission table to do different things, like collect gold, resources, earn XP, and sometimes rares. They're a stable source of income but are rather tedious. They're tinkering with them in Legion to make them more interesting.
- Depending on which buildings you make, you can farm resources, unlock quests that reward plans and other things, or send away 'work orders'.
- Work Orders: talk to the Work Order NPC and give them X number of leather/ore/herbs and they'll return with resources and stuff in a few hours
- GET MASTER PLAN - ADDON. It'll condense everything.


http://www.wowhead.com/guides/classe...stery/rotation
http://www.wowhead.com/guides/classe.../fury/rotation
Forgot how to play your class? wowhead has 100% up to date rotation information, and reasons for why. It's worth the read.

All your vanity random items are now stored in a Toy Box.
Changing stats on your weapons doesn't work anymore. It was a fix to a problem they've found a better way to fix.
Valor is back and can be used to upgrade items.
Multiboxing is still fun as fuck.

If you want to level to 100 instantly, you can buy that now.
WoW Tokens are things you can buy with gold or money that give you a month of game time.
If you want to level fast, get Heirlooms (which are now available across accounts under the Heirloom tab). Upgrading them to give XP bonuses for 90-100 requires you to buy the appropriate upgrades (about 3000g per piece).
There are +20%XP potions in your Garrison sold by a vendor in exchange for Garrison Resources, and work from lvl 91+

Hope this helps!