SPOILER: There is a scene at the end of the closing credits: Steve Rogers and Sam Wilson have Bucky Barnes in their custody, and debate on what to do. This leads into Captain America: Civil War (2016).
SPOILER: Mid credits scene: Hank Pym talks to his daughter, showing her a secret room in his basement, containing a prototype Wasp suit that was never completed. The two decide to resume work on it for her use. This leads into Ant-Man and the Wasp (2018).
There is a statement at the end of the closing credits: "Ant-Man will return." His next appearance in the MCU is in Captain America: Civil War (2016), as indicated in the post-credits scene.
"Nitrospray is a product of Premier Medical Products and is not intended to be used as shown herein." (i.e., to crack safes)