Choosing Your Primary Professions
When you want to choose the primary professions, it is better to choose two professions that work well together. It means that a crafting skill that uses your items of collecting with a gathering skill.
Herbalism is typically paired with alchemy or inscription;
Mining is typically paired with blacksmithing, jewelcrafting, or engineering;
Skinning is usually paired with leatherworking;
Enchanting and Tailoring can be paired with any profession.
As to secondary professions, since you're not limited to the number you can take, you can really grab as many as interest you are.

Selling Pet Charm Pets
Pet Charms are items used as currency for pet battles. It rewards for higher-level battle pet daily quests and can be used to purchase certain wow items and battle pets from  Giada Goldleash and  Tiffy Trapspring in the garrison  Pet Menagerie.
Once your Pet Menagerie reaches level 3, you will no longer be able to do the previous daily quest, but instead will be able to complete a new daily quest.

Warfront Contribution Sales
Make a donation to the war effort. You can donate gold, War Resources, or crafted equipment.
This quest starts and ends in Boralus.
Rewards: You will receive 23 Gold 40 silver
Gains: 17,850 experience

Looking for Raid (LFR)
LFR or the Raid Finder is a tool that helps players find and join a random or specific raid instance with others. LFR is the flipside of building up to the most useful methods.