DDs are 13 and 14. We still do stockings (although of course they no longer believe in FC). Stockings tend to comprise a mixture of the usual stocking stuff plus 2 or 3 more expensive "proper" presents (but smallish in size). They are mainly surprises rather than things they have asked for (which they will get as non-stocking presents later in the day).
DD2 has pretty conventional likes for a girl of that age so should be fairly easy. DD1 is slightly harder as she is apparently considered to be "cool" (whatever this means), so need more ideas for her in particular. I think i asked a similar question last year and got good ideas, but no doubt what is "cool" has moved on.