Great selection of books and magazine with a big focus on rare. out-of-print books Japanese photography. Can sends hours in this little shop. I'd try to avoid on Market day (Saturday) if you want to have a good look as it can get a bit busy for such a small space.
Leila McAlister's grocery shop and café off Arnold Circus, Shoreditch. You can find the best of everything, from jars of horseradish to eggs and croissants.
Apart from the fact that its building is worth a visit by itself as it's the only purpose-built stable that functioned as a horse hospital within Central London that is still intact, it also offers some of the best underground and avant-garde culture in London. Aside from exhibitions, film screenings and music events it also houses 'The Contemporary Wardrobe Collection' which features vintage street fashion, couture items and accessories to the Film, TV and Fashion industries.
The second coffee shop has to be Kaffeine. Having only recently come across this one, I was certainly impressed and they may even have the best coffee I've had, since a short stay in Portland, Oregon.