General Tips
#The animation stops you from being able to look for more clears, so look on the opposite side of the board to where the animation is to find your next move quickly.
#Always make a clear every click and try to do so high on the board to cause more clears.
#In Atlantis, try to avoid clearing at the edges so that you don't get chests stuck there.

Other (2 videos)

How to Clear Chests While Hauling Treasure (3:27)
A series of tips on how to clear chests in TH by Yassenn
Treasure Haul- by Fiara (1:38)
A short example of Treasure Hauling.