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.  

The best cheeseburger in Berlin costs less than 5. Burgermeister is mandatory in town when you're craving for a basic and delicious to the bits chesseburger. 

I often go exploring into random and dilapidated areas of Berlin. I like the thrill of finding new nooks and crannies with strange visual sites. A few months ago, an old housing colony was abandoned, and many objects (such as couches and front doors) were left at the edge of the city to rot or to be scavenged. This is a view from a non-descript area of the S-bahn train tracks (between Sonnennallee station and Treptower Park station) into the most Southern part of Neukölln district.

Best record store in Berlin. A great selection of Rock, Folk, Indie, Wave, Industrial and especially the huge floor dedicated to House and Techno Records. Staff are typical Berlin-Style - not very friendly but very knowledgeable.

Best cheesecake in Berlin. Nothing else to add.