Bear Quest: kill the two bears and give em to Olnix for 100 gold a piece and some bearskins, give the bearskins to the lost man in the caves and he'll follow you home. take him to Ne'bula for a 1000 gold reward.

Crystal Quest: kill the two crystal shards and give them to either apprentice for either 200 or 300 gold each.... once something happened when I did it but lets explain that with the fact that my imagination is so overactive I don't see the text in Achaea, but people walking around and the actions they are doing, which leads to some major wishes that I believed in taking aspirin or something... sedatives maybe?

Tusk Quest: grab the three tusks from the mammoth graveyard and give them to kromleth the bridge guy for like 100 gold each.

Fish Quest: kill the fish and give it to Shmeeg (the Wendigo not the dude from the falls!) for a nice chunk of xp

The Shard Quest: This is already up, but I wanted to let you know that you can also (I don't know why you would want to) give the shards to the cavemen for half the gold than to the Apprentice.  100 gold if you give to the cavemen, 200 gold if you give to the apprentice. (a piece)