I probable knew this before but never thought about it - there are loads of places you can get Nectar points online! Like eBay, Amazon, ELC, Boden, Game, Toys R Us....
You have to go to the website via Nectar - so go to Nectar eStores, then click the logo for eg eBay - you enter your Nectar card number and start shopping!
Why didn't I do this before??!!