We have a new guide up, exploring the wonderful world of trading. It's a worthwhile (and potentially lucrative) read and fairly comprehensive. Excerpt:

The skill sets required for trading are both many and diverse. While not as involved as a combat or mining profession, the time investment is substantial none the less. You begin with very limited access to the higher tiered skills (as opposed to the other professions), but they can be quickly gained with just a bit of effort. With a bit of research, you can create a character that has a "leg up" on these basic skills, which gives you room to grow quickly.

You can find it along with the rest of our guides here.