Offcourse every day you have to eat, and here are some of the places I would like to visit for my breakfast, lunch and diner.
Schwarzes Cafe
The schwarzes cafe located at Kantstraße 148 in the Charlottenburg-Wilmersdorf district is a secret tipp not only because of it’s opening hours, it’s open 24hours per day, but also because of it’s large selection in breakfast options.
http://www.schwarzescafe-berlin.de/
Burgermeister
The Burgermeister is a nice little hamburger place located at Oberbaumstr. 8 in the Berlin–Kreuzberg district, close to the Oberbaumbrucke and the famous East-Side Gallery.
It is located under the arches of the u-bahn track running above.
Fun fact: the name “Burgermeister” has nothing to do with hamburgers, but is the German word for mayor.
Curry 36
In Berlin the currywurst is invented. This sausage is now a famous snack all over Germany.
One of the most famous places to eat you currywurst in Berlin is the Curry 36 located at the Mehringdamm 36 in the Kreuzberg district.