Types and Categories of Gold-Making
Gathering Professions
Gathering professions are a reliable source of gold as they provide essential materials that can be sold. The three main gathering professions are Mining, Herbalism, and Skinning:

Mining: This involves collecting ores and Path of exile currency minerals from various zones. Cataclysm introduced new ores such as Obsidium, Elementium, and Pyrite, found in zones like Mount Hyjal, Twilight Highlands, and Deepholm. These materials are in constant demand for crafting professions.

Herbalism: Herbalists collect plants required for Alchemy and Inscription. New herbs like Cinderbloom, Stormvine, and Twilight Jasmine are valuable and found in zones like Uldum and Deepholm.

Skinning: This involves gathering skins and leather from slain animals. New leathers like Savage Leather and Pristine Hide are essential for Leatherworking. Twilight Highlands and Uldum are prime zones for skinning.

Focusing on gathering professions as you level up and explore can provide a steady flow of Path of exile currency for sale income.