Make sure you have gather add-on turned on so you can recall where your nods are that you have farmed and that other people in your guild have farmed
Most of your nods you will find buy making a path around the zone walls. the way i do is pick you start piont and just fallow the wall heading right all the way around till you are back at your start point. there are nods that pop up all over the place inside the but this is the fastest way to find them. also make sure you go into ever cave in the arena
Minning
you can do one of two thing with the ore, one sale it in ah ore usually goes for more then bars but not always so make sure you check or two you can smelt it with will help you lvl fast and sale the bars or use it to lvl another prof
Copper- 1-65
Alliance
Human-Elwynn Forest Elwynn- the forest isn't surrounded by mountains on all 4 sides so fallow your rivers around the outside of zone, there is not a whole lot of nods around the rivers but you will see a few pop
.
Dwarfs & Gnomes-Dun Morogh. this place is full of mining nods. in my opinion the best place to farm copper, just fallow the mouton wall, and caves and you are set here
Night Elves - Darkshore- this place is huge, it will take a while to minning, but there is a lot to mine here, you will just to have a bit of patents
Draenei - Azuremyst isle- Make sure you hit the caves. they have a good amount of nods in them
Hord-
Undead - Tirisfal Glades- make sure you watch you path here some of the mobs might be to high lvl for you so stay where you know you will be safe
Tauren - Mulgore = if you are low in lvl stay out of the caves. other then that your agro should not be a big problem seeing you staying on the outside edge
Orc & Troll - Durotar- this place has a lot of nods all over the place, but is a pain the butt when trying to lvl, and takes a good amount of time
Blood Elves - Eversong Woods - This route is the simplest route to follow. There are other mines near West Sanctum and West of Sunsail Anchorage but if you're looking for simplicity this is the route to take. The Deadscar is loaded with mines
65-125 Tin and Silver
the barrens- is the best sport for this it has tons of both and easy to farm. this is the place to hit for sure
Wetlands- there is a mine that has tons and tons of blood ore nods. witch are there for a quest, you can not smelt or ah these things but it is a fast way to lvling minning
126-175 Iron and Gold
Arathi Highlands- good mining area. This is where I mined. Be sure to check caves!
Thousand Needles-You could also do the Thousand Needles route, it's one big loop into the Shimmering Flights. There are two caves on the route that you want to make sure you hit up.
Stranglethorn Vale- this place has 3 caves that are wroth going into, it is good to mine if lvling as there are tons of mobs. if your not lvling the mobs get old fast
176-250 Mithril and Truesilver-
Searing Gorge is full of Mithril and has some Dark Iron (lvl 230 mining)
The Hinterlands- this place is good, but a bit slow to mine
Badlands-You will want to spend most of your time in the eastern loop or in the cave in the south west.
Tanaris- this is along run, but make sure you also jump down in cavers, and hives here
251-300 Thorium and Mithril-
Burning Stepps- is my favorite mining spot for Thorium.
UnGoro Crater- one of the most highly competitive zones known to the gold farmers (or used to be).
Winterspring-There north cave map is a full cave system that you can go in to, the bottom cave is just very small caves but thorium spawns in that area, the bottom left comer is filled with elite mobs so be careful there
Silithus- make sure you go in to the tunnel system
300-325 Fel Iron-
Hellfire- is the very best for Fel Iron.
at least on my sever the still sale for good amount because they are not farmed much anymore
325-350 Adamantite Ore-
Nagrand- pre Wrath was packed full of people minning mining for Adamantite.now no one goes there so there is a lot for you here.anywhere you look in the zone you can find adamantite veins.
350-400 Cobalt-
The Howling Fjord- is the best for Cobalt.
Zul'Drak- not anywhere close to the howling fjord for cobalt but you can lvl here if you choose to
400-450 Saronite-
Sholazar Basin is THE best. It is crowded though, but it is a miner's heaven due to it's structure