onger chains and entering fever more often will boost your EXP points earned per game.
The more times you activate your MyTsum's skill the more EXP points you will earn.
The more tsums you clear the more EXP points earned per game.
The experience star bombs/bubbles will boost EXP points earned as well.
Maleficent generates lots of bombs/bubbles with goodies in them during her burn if you make lots of chains, and Miss Bunny's skill generates bombs/bubbles with goodies in them. They are both good at helping you gain EXP faster.