Coney Island is the best for everything - the beach, the rides, the beer - but mostly for the Skee Ball. It's incredibly addicting, affordable and satisfying (depending on your aim).
This is a very delicious Sandwich place in my neighborhood. I normally order the #5 - Bell' americano. It's a great sandwich. Also try the wonderful cookies.
Cobble Hill Cinemas is a cozy little neighborhood theatre. It has all the charm Brooklyn has to offer, screening new releases as well as selected independent films.