As crafting skills are important in Aion, so you should know this tip to increase your crafting skills.
After you learn a crafting skill, you can get crafting requests(never-ending) from crafting master.

You can increase the crafting skill level quickly by doing the quests. With your skill lvevl up to 10, 20, 30..., you can get the new quests of higher levels.

This is lv20 crafting quest for tailor:

The quests will offer you some required material and you can buy the lack ones from the crafting merchant. What you need is time and gold, just a few quests need some booty from monsters.


Ps. you can learn all crafting skills if you want, but you can only increase one skill to the highest level.