General

Board Game + Town Boxes + Maple Leaves Falling on my Head.

Do the following every day:

1) Do the "Coins Every Day" quest
2) Do the Mu Lung Meltdown quest (and do a Dojo run)
3) Get and roll dice until you get a quest.
4) Activate and feed your seedlings if you have any (if not, do so as soon as possible)
5) Go to a training area you can fight monsters in your level range that drop boxes/leaves (The Level Up guide works well)
6) Complete the quest on the game board and roll again until you get another quest.
7) Continue training until you need to go back to town.
8) Trade leaves with Cassandra for coins (100 leaves per coin)

Also, at any time you're in town, open gold boxes for leaves and present boxes. Also remember to open both the purple and gold boxes for coins and other goodies.

That's pretty much the best way to get coins... all of the above steps... or, to be blunt... by playing the game.

Hoard the die. Then roll for quests.

do the board game and go to hottimes and each level get the leaves from the event and your daily coins ofc

click on the boxes in the towns to get maple leaves and scrolls
buy them if you have money

Other then buying >_<

Fastest way? Buy the leaves.