Ahhh! In a frenzy to get all my professions listed, recipes recorded and blogs read up-to-date, I completely forgot about another set of potential gold makers - secondary professions - namely cooking and fishing. (Arch not so much) I haven't bothered with either for ages, only occasionally cooking up a few Seafood Magnifique Feasts for raids using fish bought from the AH when my stack nearly used up. Looking at my realm's pricing, those raw fish goes for quiet a nice profit. Definitely something to look into.
Another idea, to break the monotony of farming is to break them up into hour chunks. Say, spend one hour farming Cobalt, then move on to another alt to farm embersilk, and etc. List the items gain in each hour chunk to determine efficiency of time spent.