Read the best Leatherworking guides for Vanilla / Classic WoW on the fansite WowIsClassic. Guides like "Leveling Leatherworking 1-300" will help you to quickly level up your Leatherworking from lvl 1 to lvl 300. You will also find guides that list the best patterns / recipes for Leatherworking , their drop locations and a lot of tips for Leatherworking in Classic WoW.
Here is the Leatherworking leveling 1-300 guide. Best tips for leveling your profession quickly