This is only a tip, all prices are from my server. This has worked for me and I am still doing this
I am boost leveling my low level alts in Shadowfang Keep (min level 10). Two of them have skinning as profession. You can skin allmost everything here and get about 5 stacks of light leather per run. I have sold them in AH for 10g per stack. I have no idea why people pay so much gold for these but I have made hundreds of gold by this far. 50g per 15min run + greens + cloth
Other that I have found very profitable is copper ore (10g per stack), medium level herbs, wool and silk cloth (15g and 5g per stack). Very easy money with very low effort.
I use different chars to but these items on AH and make different prices as well. Keep prices very high with one char and sell a bit less with others. Do not try to sell all at the same time.
p.s. Remember also that WinterVeil is coming and people will need eggs!