Here are some lists of discovered values you can change. These are not complete, I couldn't figure out how to reference everything.
Format: Set count with [reference] = #, or check count with [reference]
Item Inventory Counts
This list is not complete. No need to go crazy with these, < 200 should be plenty of anything!
Spoiler! Having 20 potions makes the fight with Snape very easy!
Spoiler! Having 100 wine makes building rapport with Snape very easy!
Or "How to Easily cripple Gryffindor and elevate Slytherin"
Calendar and Gold
Because sometimes, you just don't want to admit you rummaged the cupboard 100 times.
Or "Attitude Adjustment for a Whore in Training"
Increasing whoring value can prevent certain scenes from happening, or cripple your game.
Spoiler! Decreasing whoring can let you see scenes you skipped over!
Spoiler! Setting mad = 0 in the middle of a scene will reset angry Hermione to calm slut!