I'm amazed that so many people haven't seen these scams before- I get lots even though I try to be careful about which email addresses I give to different organisations/people.
If it doesn't mention your name (if it's just Dear customer etc) delete it; if the address of the sender when you hover over it looks odd, delete it; if you don't have an account with the organsiation it claims to be from, delete it.
Even if it looks genuine don't click on any links- log into your Amazon etc account to check. Expect to get scam ones soon claiming to be from Talk Talk, RBS, M&S who have had data breaches