You can start checking your emails because Sony has started sending 10% discount coupons for PSN. This means you can purchase upto $150 worth of items and get 10% discount. It is not significant but still decent.
Sony had announced this gift earlier due to PSN outage of Christmas 2014. PSN was down for almost three days due to being DDOSed by hackers, but it is running well after recovering.
Slow messages and other issues are being fixed but there is no ETA on them. You can redeem the 10% off code and get the discount for whatever you have in your PSN cart.
Let us know in the comments section whether you got it or not. The coupon is valid for three days so you have to be quick.