Group up for quests - All too many times you see people completing for kills of a rare mob for a specific quest, this is a horribly inefficient use of time considering the group system was put in place to allow people to cooperate on quests, if you see someone else on your quest, group up with them to complete it.

Run instances minimally - While instances are fun, and provide good gear and items, they tend to be time consuming in the long run, while you’re looking for members, going to the instance and waiting for everyone to arrive, you could have gained a lot of xp. If you’re in bad need of gear upgrades, run an instance or two, otherwise, try to avoid them.

Turn on the quick warcraft gold quest text option - Look for the wow gold quest text option in the option menu and toggle it on. If you’ve played the game before, chances are you know all or most the quests already, and don’t need to spend the extra minute or waiting for the text to finish popping up.

Minimize travel time - If there’s a buy wow gold quest you need to turn in at a specific city, consider it’s importance relative to your overall XP/hour, if you can turn it in later, wait, if not, try to turn in multiple quests there at the same time.

Use combos to quickly kill mobs - When grinding it can be tempting to put your character on auto-attack, and then rinse and repeat, however, to be time efficient it’s best to test your character’s abilities and find out what combination can bring down a mob the fastest, even a second or two off the top can mean thousands more xp/hour.