Just until recently this place used to be one big old Aphoteke (Pharmacy). They have kept the Apotheke's  dark wood Art Deco charm to use in benefit of great coffee and fantastic brunch (try the french toast and you'll see I'm not lying). 

Zola is a Neapolitan style pizza joint hidden inside a Kreuzberg backyard. This is a killer pizza place, one of the best in Berlin without a doubt. 

A very nice little second-hand bookstore, including a shelve with international books in French, English, and Spanish too. Always nice people to meet and a great selection of art and cook books, for affordable prices.

If you want something a little different from your beer, try Lager Lager. "We are an independent bottle shop and taproom in Neukölln with a passion for all things beer. Choose from our 8 rotating taps and 250+ bottles, with new stock arriving each week. Drink in or takeaway a Growler bottle of your favourite beer using our counter-pressure bottle filler, which guarantees freshness."

A place where I spend some time almost everyday is the Marheineke Markthalle on Bergmannstraße in Kreuzberg. It's just around the corner from where I live and a great place to buy fresh food and products from local farmers or all kinds of delicatessen from different countries. Many market stalls also sell freshly prepared food and it's always busy at lunchtime. For saturday mornings try the original french croissants.