Hmm...I hadn't thought much about that either. We are set in modern day. Try to put yourself in the mind of your character and fill your pockets/bag with the stuff they would carry?
Like for me...I always do the "wallet, keys, cellphone" check before I walk out the door. At home, I've got my laptop, it only occasionally leaves the house when i know I will be sitting around somewhere with time to kill. I also have a couple external batteries for charging my phone on the go, and the cords that go with that.
Shani will carry a number of trinkets and talisman to focus her spells on. She doesn't own a car since she can fly, maybe you want to claim a mode of transport?