I know this is much and some of them don't make sense but maybe you would have some more ideas when you see what triggers I can add.
How much times the player has died,
How much players did the player kill,
How much mobs did the player kill,
How much mobs or players the player has killed,
The Players amount of health,
The players amount of xp,
The players amount of food bars,
The players amount of air when he/she is swimming,
How much specific blocks has the player mined,
Animals bred,
When the player eats a slice of cake,
Damage dealt,
Damage taken,
Items dropped,
When the player jumps,
When the player dies,
When the player mines a specified block,
When the player breaks a specified item,
When the player crafts a specified item,
When the player uses an item or places a block,
When the player picks up a specified item,
When the player drops a specified item,
When the player is sneaking,
If the player is in a specified gamemode,
players heads rotation
