The easiest way to earn them is by reading new stories.
However, make sure that you purchase the bigger packs as you will get a better deal on them.
Also, keep an eye on the game shop for bundle packs, because on special occasions, bundle packs are offered to gamers at a throw away price.
Each achievement also states the amount of experience points attached to it.
So, make sure you complete the achievements in order to earn more or just use Choices Cheats 2018 and don’t think about this.
The game shop is a place where you can buy Diamonds and Keys with real money.