Originally Posted by 'puppychow',index.php?page=Thread&postID=104361#po st104361
herbalism and mining are best leveled after you hit 60 (or 70) and have your epic mount. You run into too many times where you need to "just" level another 10 points in mining/herbalism and you waste an extra hour picking flowers instead of leveling. Plus if you are instance boosting you will never see a node.
Frankly outside of enchanting and tailoring I would never level any prof while leveling. Just too much of a distraction. Bank stuff if you want. Enchanting levels easily if you instance boost, since you can DE all the greens/blues and then use the mats to further level up. Tailoring levels decently too, although you have to actually pick up all the cloth (and take a small break in the 20s to go gather wool cloth). Skinning is debatable, if you quest a lot it'll be easy to level up and not add much time.
Mining and herbalism and skinning you can level up to 300 in 4-8 hours once you are 70, you just ride around on your epic mount following the radar map.
Blacksmithing, leatherworking, engineering are very hard to level. You either have to plan far in advance and stockpile mats, or spend buttloads of money. Alchemy is very easy, the mats are cheap for the most part. Its a decent daily money maker, but nothing extraordinary. You will rarely make any pots or flasks that you yourself will use, especially nowadays with all the "easy" flasks you can get from various tokens (gruuls, shattrah, etc).