World Of warcraft! – Guides
When leveling, don’t waste time gearing up at the auction house. Going to AH every 2-3 levels for new equipment consumes a lot of your time. Just keep questing and use the armor, weapons and jewelry from quests, they are just good enough to get you by. Also, this saves you money for the epic mounts.
Make sure that your toon has the right spec for solo leveling. Killing 2-3 mobs at the time instead of only one it’s a big difference. This way anyone should be able to complete all quests at a faster rate and increase the XP gain.
Read more here – Horde Leveling Guide