Mine out as many crystal shards as you can until you get bored beyond your skull. Levels 1-10 would be a decent start. You'll thank me later for it - levelling any profession requires lots and lots of crystals.

Also - see what you can mine, and what sells well on your market if you don't need the mats yourself. Where things are an expensive buy off a vendor, you can make a nice supply of cash selling them for cheaper than vendors do.