The best thing about any charity shop is that you never know what you are going to find. I have a well tested route around London that includes all of my favourite charity shops. This Oxfam has a great selection of books and often turns up some interesting clothes too.

6a architects transformed the six-storey building at the corner of Redchurch Street into a multidisciplinary space. A shop, a gallery, a restaurant. 

My favorite museum.

Outside of the major players (Tate, V&A, RA) this is probably the best programmed gallery in London

Excellent Turkish bakery. I highly recommend their £2 gözleme.