The last thing that you should do before you log out of SWTOR for the day (By the way, you are logging out in a cantina, right?) is send your companions out on a crew skill mission, preferably a mission that will take a while to complete.
When you log back in to the game (assuming it has been longer than the crew skill mission takes), the completed crew skill mission will be there waiting for you. It’s not exactly AFK crafting, but it is pretty close. It is pretty neat to know that your crew skill missions will still be running even while you are logged out of the game!