kotaku, polygon, gamespot and ign and hard to keep up with since the have tons of post on a daily basis.
Fortunately, there is a simple solution to this that is often overseen, the playstation blog. Yup, playstation has a blog and video shows on PSN that reviews games and inform sales and discounts. I found the blog to be extremely helpful since it lacks fluff like console and game rumors that plague most gaming sites.
Do keep in mind there are dedicated playstation blog for different regions like Europe, USA, India etc. It will come in hand to add this to your new/rss reader. I highly recommend it if you want to get the most out of your playstation plus exclusivity and track price drops.