I see a lot of people (including me, until very recently!) creating plastic / shiny materials with simply a glossy material in Blender, but this looks horrible. This blend is from a [recent tutorial](http://www.mobymotionblog.com/2015/08/glossy-materials-in-cycles-the-right-way.html) on the right way to make glossy materials in Cycles, with a fresnel node to change the glossiness as the angle changes.

HDRI is from [Greg Zaal's HDRI Have Teaser Pack](https://cgcookiemarkets.com/all-products/five-16k-hdris-hdri-haven-teaser-pack/?ref=48)