Double VIP points at the online Lego store, meaning 2 VIP points for every $1.50 spent. 100 VIP points qualifies for a discount of $7.50. I bit the bullet and ordered the Ninjago City city. $499, 666 VIP points, comes to around $89$50 in points that I can use for the next purchase.
I use the Lego store to buy sets that are not available in shops. If you're looking for a non-exclusive set, it's usually cheaper elsewhere.
Signing up for a VIP account is free on the Lego website. Free shipping for orders over $200.
Next double VIP event should be in March.