Give your usual haircare product a holiday mood: add a big spoon of base oil (jojoba, hazelnut, peach or even olive), about 8 drops of orange oil and 1 or 2 drops of cinnamon oil.
It's better to choose a product with no distinctive scent so that nothing would interfere with the one oils will give. Your hair will smell like Christmas cookies. :)
CAUTION: do not overdose cinnamon oil! You might get a chemical burn on your skin!
Side effects? Of course! After using this combination of oils I got a noticeable increase of positive attention from 30+ guys. And I can't say it wasn't nice. ^___^