Don’t just kill them … SKIN THEM!
From the start to the end of the grind of level 1-60 you will visit many places and kill different types of mobs. A lot of these mobs will be beasts and can be skinned to get Light, Medium, Heavy, Thick or Rugged Leather/Hides. Skinning is a gradual source of income that makes your grind more efficient since you make the most out of the mobs that you kill (so pick up skinning as soon as you can). Now I know light leather sells rather cheap, but don’t be put off by this as you’ll be killing a huge number of mobs and that is what will grant you lots of leather, which in turn will add up to quite a sum. Check out the local auction house to see the median price on whatever leather type your lvl (level) mobs yield and sell all your leather at a lower price than that. As you level up further, the price of the leather you get increases as well.
Mining or Herbalism, Pick one.
Pick up an accompanying gathering profession with skinning. You should preferably pick up ‘Mining + Skinning’ or ‘Herbalism + Skinning’. DO NOT (are you feeling the emphasis here?) pick up Herbalism + Mining since you can only track one of them at a time. The minerals or the herbs you obtain sell for quite a small sum but it’s better than having a Trade skill like Engineering or Blacksmithing since these aren’t extremely financially viable and are a pain to level up. The Lowbie ( low level newbie) stuff like Peacebloom and Copper bars sell pretty fast if you price them low as a lot of higher leveled people power-level their professions and need these materials.
what you want to do is buy a good fishing rod sword sheild helmet etc. and auction them for twice the price 
