Best gold you can make on the side is buying low and selling high!

If you scan while you eat dinner or take a shower you can easily buy 10-20 items that are underpriced and resell them with a nice profit, and if you cba to do much of the work just buy the REALY good and rare deals.

I earned 2-3k each week after doing this for 2 weeks, but it takes some training thought.

Dailies is without any doubt the best way to make money for a boxer. When i started out clearing all instances with my pve team i earned 5k gold drops and general loot(I guess you could add about 1k in enchanting maths)

On doing around 100 quests in icecrown ive earned 2k gold aka 10k gold (4 boxed) in 12-14 hours. Thats pretty good in my eyes without epic flyers!