First off, Pantherfern, welcome to WoW. Trainers used to tell you who you needed to see next in order to progress your tradeskill, but in a number of situations lately I have not had them tell me whom to seek out next (cooking book, first aid book, etc.). Still, as you say, I have played through this content quite a few times before, and either know where to find them or know where to find the information on where they are.
But as to Ambrya, consider yourself lucky in that you continue to get skillups without visiting the trainer. Much like another poster in this thread, my skills are capped and are not improving (as they shouldn't) despite picking herbs that are yellow or orange to me. Same thing goes with my young scribe. Skill level 300 (character level 41), scribing orange inscriptions and no skillup.
Ambrya, will you buy me a lottery ticket, please? *grin*
Edited, Apr 15th 2009 2:27pm by Dosgamer