Hopped in to the 500k bandwagon sometime after the patch too. And as when I reached gold cap, I thought that it would be enough. But now you've gone and made the next bigger thread, so let's see how long it takes to double that 500k.
Anyway, main methods haven't changed, but of course stocking for 3.3 gave nice returns for the last rush to 500k. In hindsight I really should have stocked more epic gems, would have gained pretty much double of what I have now. For example red and yellow epic gems used to sell for 140g or so, when now it's rare to get anything under 200g. Oh well, live and learn. Good to know what to stock for patches with lots of new instances, well in the next expansion then.
I still have truckloads of herbs and Frost lotuses that I haven't unloaded. The lotus prices are just starting to climb up (with a little help from yours truly) so not liquidating that much yet. Hopefully after the holidays when new raid bosses open the price should be somewhat higher still. If not I'll at least have flask materials to last my own use for the rest of the expansion.