My teenaged sister is an awesome cook, so she often gets a recipe book from me, sometimes with the ingredients to make one of the more exotic recipes in it. My parents have a pretty limited palate, so cooking exotic recipes is great fun for her.
Jewellery is always a winner too. As are clothes if you can get her style and size right.
This year my sis is heading to uni, so she's getting a "uni starter pack" with maps of the campus and the new city, a set of shot glasses, some condoms

, maybe a notes folder of sorts and seeing as I live in the town she's moving to, some vouchers for a few homecooked meals and maybe some laundry

It's not a very expensive present but one she'll appreciate.