Use an element that the enemy is weak against to do double damage. Elements also are a factor in determining the damage you receive when enemies attack, as well as certain active skills. Most of the storybooks rely on one element more than the others.

Keep two or more each element type leveled up and ready. It is possible to keep a full party of each element.

There are a lot of useful skills, especially those that allow you to change one type of tile for another.

Spend your gems to obtain rare characters.

Sell one-star and two-star characters as soon as you have your team filled with three-star or better characters.

Power your team members up often. Use found books to level your characters up. Enter the "Enhance" and use potions to increase health and attack stats, elixirs to get enchantments, and access the evolve and merge abilities.