For under 6 euros you can get the best burgers of the city. This small place is always full and anytime is good to eat their hamburgers.

Great place for Bulgogi and the original place of a small street food success story in Berlin. 

Cosmoveda is a hidden xberg gem. It's an Ayurvedic supermaket that happens to come with a kitchen with it. There you can find a delicious Ayurvedic lunch menu (with soup, main and a little dessert) in 3 different sizes, prices starting at just 5,90. Not to mention you can shop the ingredients that you just ate in case you want to try to cook Ayurvedic yourself.  

A good place to drown your Berliner winter-melancholy. The bartenders are top notch and the interior is warm but stylish, with the inevitable retro vibe. Open from 6 till late. There´s also a legendary (and kinda expensive) restaurant next door, which provides the bar with some excellent snacks. Works for dates and for friends, but if you´re planning for a bigger group it might be wise to reserve.

This café is where I go when I want to feel at home and spoil myself with food prepared with passion and care. I spend hours between a coffee and a carrot cake while working on my computer