I think this can be tricky - it depends on what your general clientelle are like and their age etc. My area I find are not very Nail arty at all and I have tried loads of various displays etc!
But at the end I only have 2 things on my xmas list - Glitter acrylic & rhinestones!
1 - Nail Graphix - Diamonds in the Rough over Creatives white performance tips - This is the best! My clients go mad for this at christmas & for their holidays (or when they're feeling blue :sad
Super Easy to do, and never bulky! (I have a pic of them in my album)
I have a few other colours but find they are not used so much by my clients (only by me mainly :cry
but you could go for a bling Red, Baby Pink, Lilac or Bright Blue!
2 - Normal rhinestones or - my fave -
Jam Nail Stickers from DSFM.uk.com - they are great and the site guys are really nice too! My ladies end up having these across their p&ws regularly!
Hope this helps! x
p.s. 3 - I always buy creatives xmas mini tubs for clients as a free gift! Cute, professional & keeps everyone happy!
(not a whole tub each lol!)