1. Cheaply level your craft
This tip assumes you know the basics of crafting. The fastest and cheapest way to raise your crafting skill is to complete work orders given out by your crafting trainer in the Artisan district in your capital city. Crafting costs kinah (money), but there are three important things you should bear in mind to maximize your savings.
First, only grind up your skill on work orders 10-15 levels below your current crafting level. For instance, if your Tailoring is at 40, only do work orders that require a 30 Tailoring until you reach 50 skill points. Each work order will give you around 1-1.5 skill points, will complete more quickly with a higher level of success, and your extra ingredient(s) cost will be lower from the crafting vendor.
Second, only make as many items as needed to complete your work order. Each work order only requires that you create 6 items but the trainer gives you enough basic ingredients for 8. Too many people click "Craft All," which ends up wasting additional resources (i.e., money). Manually type in "6" and then press your craft button.