How to start making gold with glyphs

In my opinion the most challenging profession to start making gold with is Inscription. You have to have some form of automation or be willing to sit behind your computer looking at the AH screen for hours at a time. A total of 340 glyphs is a lot especially if you want to be selling them all at just a little bit under your competition.

You also have to invest some gold before reaching it's full potential, with the 4.0.1 changes a new scribe is looking at the following expenses:
- 57 Books of Glyph Mastery
- 603 Inks to craft all glyphs available from trainers and books
- Two banking alts and 6 Pack of Endless Pockets to hold all of them (eventually you'll need 8 Packs and skip a few glyphs)
With this you've only crafted each glyph available without the Northrend and Minor glyph researches once, in order to be succesful at selling glyphs you're going to need a lot more Inks though. On my server this comes down to about 6.5k gold, if you've been collecting the needed Inks beforehand.

But what if you don't have 6k available but want to start making some gold right away? I would recommend starting with all the glyphs available from trainers which are listed on Elitist Jerks as best choices and the first two available from your first Northrend and Minor researches. At time of writing this are the following glyphs:
- Glyph of Arcane Blast
- Glyph of Arcane Missiles
- Glyph of Arcane Power
- Glyph of Backstab
- Glyph of Cleansing
- Glyph of Crusader Strike
- Glyph of Death Strike
- Glyph of Disengage
- Glyph of Dispel Magic
- Glyph of Divine Favor
- Glyph of Earth Shield
- Glyph of Earthliving Weapon
- Glyph of Ferocius Bite
- Glyph of Focus
- Glyph of Froststrike
- Glyph of Healing Stream Totem
- Glyph of Holy Nova
- Glyph of Ice Lance
- Glyph of Icy Touch
- Glyph of Imp
- Glyph of Incinerate
- Glyph of Insect Swarm
- Glyph of Lash of Pain
- Glyph of Mage Armor (if possible)
- Glyph of Mending
- Glyph of Mind Flay
- Glyph of Misdirection
- Glyph of Moonfire
- Glyph of Mutilate
- Glyph of Plague Strike
- Glyph of Power Word: Shield
- Glyph of Raise Dead
- Glyph of Rebirth
- Glyph of Rejuvenation
- Glyph of Scourge Strike
- Glyph of Shadow Bolt
- Glyph of Shadow Word: Pain
- Glyph of Sinister Strike
- Glyph of Soul Swap
- Glyph of Water Shield
- Glyph of Word of Glory
- Glyph of Wrath

After you've created two of each glyph make sure you know how much each glyph cost to make, I personally spend max 5 gold on each Ink which results in a maximum cost of 15g 50s. Of course I want to make a little bit of gold on each sale so I won't list a glyph below 20g buyout.
Since some of these glyphs will be made in bulk by levelling scribes you wont be able to list all of them all the time (unless you're willing to sell them with a loss) but you should be able to list enough to make a little profit every day. Keep investing that profit in Book of Glyph Mastery and don't forget to do each glyph research whenever possible and your daily profits should increase steadily.

This amount of glyphs can be listed manually but I strongly advice to check out Auction Profit Master. With just a single Item Group for your glyphs you can very easily post all your glyphs, check if you've been undercut and repost if needed.
The settings I use for my Glyps Item Group are:
Post cap: 2
Per auction: 1
Undercut by: 1c
Threshold: 20g
Fallback: 65g
Maximum price: 170%

This ensures I will never post below the line of making and losing gold, don't post glyphs at retarded prices (max 110g50s) and only undercut for 1 copper (preventing a rapid decline of listing price due to heavy undercutting).

Just make sure to check your auctions for being undercut whenever possible and relist if needed, don't burn yourself out by re-checking every 15 minutes though.