well basically you have to lvl up a bit mate.... unless you get a higher lvl to kill the mobs and you go around skinning them. But 150 skinning iss enough to skin a lvl 30 mob (i think) and in hillsbrad foothills is a yeti cave. full of lvl 30-32 yetis (hummanoids) that you skin. Brilliant place if you ask me. Well i got my skinning from 1-300 in a solid day after droipping blacksmithing. just went to the lvl 43-47 yetis in feral scar vale. Just grind a bit, get you lvl up and wait until you get to about lvl 28 (high enough to kill lvl 30) depending on ur class.
hope ive helped
ah almost forgot... in the hinterlands (near the horde village) is a collection on GIANT turtles (neutral) and people are always farming these for exp as it is right next to the horde village, raventusk or summin. Simply go along behind them and skin the turtles and on every few ones you get turtle hides which may sell for a fair price. BTW you need 240-260 skinning as the turtles are lvl 49-51.