What do you know by heart?

I studied Literature at college, so I have whole passages and epic poems carved into my brain: Tennyson's Lady of Shallot, Poe's Raven, Goethe's Der Erlkonig, and a dozen of Rimbaud's poems, I can rattle them off for you... then of course I still know almost every song that hit the charts during my growing up years between 1970-1985, and as a parent I know all the Disney songs too, and very likely all their screenplays as well ("Once upon a time there lived...")

 
What I wish I could learn by heart? Mobile phone numbers for my husband and daughter, so I wouldn't need the speed dial in an emergency. Doctor appointments...what I'm supposed to be doing today. Where I put my glasses. All these passwords I need for the computer.... oh boy. The 40's have their moments. Unfortunately, I'm forgetting them all as they happen.