here's a couple....
if you know her do shit she does with her friends....
teach her how to ski.
go sledding
make her some breakfast
take her out to breakfast
go fucking shopping
idk how old you are, but go to a bunch of stupid fucking shops in your town or in a nearby one just walk around in them then get coffee, then go to her house/yours/hotel room/car and fuck.
take her out to lunch
go fuck
do shit she likes and make it seem like you are trying super hard the whole time, and then after on the drive home be like. i'm soo sorry babe, i just can't make you happy. i wish there was a way i could....
SEX.