I've been thinking about how to best use my Dungeon Tiles lately, and I've found that the best way for me is to design a room, then build the story; rather than try to recreate a room I've designed or found in a published adventrue.
You're just not going to get the tiles to match, and you're going to end up tossing them aside. I designed a few nice rooms, and the images instantly created the stories for me.
This is an arcane library I created, after I couldn't find any suitable maps online.
Here's another element I plan to add to my dungeon tile encounters:
Read more about this at my blog: www.newbiedm.com