If you redeem your nectar points on selected 'Star Treats', or at selected nectar retailers before 31st December, Nectar will give you an extra 500 nectar points by 31st January.
If there's nothing that particularly interests you, you can still benefit from this by just 'spending' 500 points at Argos, for example, and getting £2.50 off your shopping there. When nectar give you your bonus 500 points, you'll have got £2.50 of stuff from Argos for free. The same goes for the blockbuster or cannons day pass deal.
Full details from the site to follow