Leave the station for Flask Walk - then Walk to the Flask
One of my favourite streets in North London could best be described as an alleyway, or even a side passage - meant to be discovered rather than just walked down. To find it, first you need to head to Hampstead Station (on the Northern Line). My way of getting there is to turn left out of the station onto Hampstead High Street, then take the first left turn available. Here's what you will find -
There are plenty of independent shops, and of course the obligatory pub (in this case the aptly named "The Flask"). You could keep yourself sustained and entertained without even needing to move more than a few metres - thanks to the excellent second-hand bookshop Keith Fawkes - even this shop could keep you entertained for hours thanks to the sheer volume of books held here. Should you feel peckish, right next door is the lovely Sushi Hana, and next to that Boulangerie Bon Matin - so that's lunch sorted (or dinner).
Either pre- or post-eating, you may find yourself attracted to the antique shop (Exclusive), or even the flower shop or beauty store.
Should you feel like making a day (or night) of it, there's the aforementioned pub, with copious space inside, and if the weather is good, out. The rather nice restaurant towards the end of the strip - La Cage Imaginaire - makes for a nice finishing spot to round out the day, or take up some of the evening.
Whatever you decide, it is the street that is the star - a perfectly hidden location with lots of lovely diversions, in one of North London's most attractive locales - what more could you want?