One thing that hurt me was working on the Darkmoon card decks. The cost of putting together several decks, only to find them not selling well on my server at all. So I decided before the Darkmoon faire left Shattarath I turned in the deck for myself. And I gifted one to a good friend I play with. So I found myself at the 15k gold mark, and realized I needed to change some priorities. Just to be clear this is the gold on my AH banker, I use a separate alt with a guild bank as a sort of non-interest bearing savings account. That gold I didn't dip into.
So I re-evaluated what I was doing differently. As of right now I have max leveled inscription, herbalism, alchemy, and tailoring. After Cataclysm I continued to craft netherweave bags (which has recently increased in profitability due to netherweave cloth dropping in price and netherweave bags selling for higher). Also I began selling mysterious fortune cards, fortune cookies, inferno inks, relics, embersilk bags, hyjal bags, abyssal bags, some crafted cloth items for lvl 80-85, flasks, health pots, uncut meta gems, & raw and cooked food items.
I also re-evaluated the glyph market which I had backed out of once prices dropped. Mostly because of the effort to auction glyphs. So I decided to work my way back on the glyph market, crafting any glyphs that were over 50g buyout. With all of the herbs I'm milling I use the ink trader to get the inks for the different types of glyphs, then all of the inferno inks I sell in stacks of 5.
So sometimes it's time to hit reset and get back to diversification rather than make money in big riskier specializations. Diversifying allows more subtle adjustments before you find yourself with a cash flow problem in your operation.
It's all about base hits not the home runs. There's always a good feeling when you go to your mailbox and pull 5 - 10,000 gold from it over the last few hours, which you spent watching Criminal Minds with your wife.