When dealing with so many glyphs you have a lot of inventory to manage. I use bank bags that I swap around when posting. So I have 5 inscription bags in the bank and 4 on my character.
The first thing that I do is put as much into my bank bags as I can. I use that as my stacking point. I don't want to have a partial stack in my bag and the other 1/2 in the bank. If you don't manage it you could easily have partial stacks of the same glyph in several different bags. I use a mod called bank stack to compress and sort everything.
I then fill my inscription bags and make a trip to the ah. I then return and swap bags between my char and my bank. This way each trip has a different set of glyphs. I don't loose time rescanning glyphs that I just posted and its quick to move the bags. (instead of trying to move glyphs in and out by hand one at a time)
This is starting to feel more fluid then it did at first. Several people sugested to use 2-3 alts to post glyphs. If doing it that way its common to give all of a class's glyphs to set alts. You can do it by color if you want. But its a symple system to know who gets what glyph. It is also common to use a guild bank to save on postage.