Questing for good XPFollow

Just wondering if any of you could help out with suggestions on some good quests that are fun and give some decent XP, right now I'm lvl 18...almost 19 and just finished my Warlock Quest...which was actually pretty easy, the hardest part was getting the stones from the gnolls. I got a hefty chunk of xp off of that, and then I finished a collection quest, got a good 10-15% off of that one. The collection quests really aren't that much fun for me though, I've got a bunch of the shards quests where all I need is just the shiny and glowing, can't seem to find them ever and on the broker they go for 1gp or more and I usually just don't have the cash to lay out just to end those quests...on top of the fact that scouring the broker for bones/shards is not my idea of fun. So, any suggestions you guys might have would be greatly apreciated.