100-150 gold per run may not sound like much, but it adds up quick and Paladins do it the best
Scholomance
Outside of Scholomance there is a Ghost Vendor (Assuming you finish the quest chain) I go in to Scholomance (I get the two confused at times)and just murder everything, complete clear collecting somewhat valuable items. Each run takes about 20-30 minutes. On my server, the cloth sells for alot, and theres alot of Green/Blue items as well as Gray items (I usually sell to the vendor) Do complete runs of Stratholme when you finish go outside, sell items to vendor, rinse, repeat
I did 125 runs and gained 12,500 gold and paid for the vendor only mats of my Chopper and on top of doing dailies, this is one hell of a way to make gold. My friend was doing it alot and now he just sells gold to people who live in our town that play wow. I've gotten tons of Blues, Greens, and a few Epic drops from this place and my server's economy is out of whack so I'm cashing in while I can.
This is more of a tip than a guide, but I want to share it with all the people (like me and suck at saving gold) Hopefully this helps somebody
EDIT I'm a Prot paladin when I farm and I glyphed the Sense Undead for 1% increase of damage and mow down mobs quick, so this place is ideal for paladins.
Assuming you play 8 hours a day and can clear Scholomance in 20 minutes, you can gain 2400G (thats at making just 100 gold per run) or 3600g in 8 hours assuming you make 150g/run add that ontop of dailies and its GG. The reason I do this is because it is GUARENTEED to make you gold unlike the guides that say "Go Farm This and AH it!"