Extra Clothes, Drugs (I prefer snuff and/or Betel), Prepaid Cards and Passes (Hotels, Hostels, Coffins, Vending, Nightclubs,Transport, etc.), Fashion Accessories (Piercings, tatoos, etc. if your GM requires buying them at CC). And of course as mentioned, Plastic Restraints. I'm also a big fan of buying thermal or UV dye splash grenades, great for raves and tracking those pesky ones that run.