Quick, easy, cheap thai food. It's fairly new to me, but easily makes this list.

Great night walks.

Stationery, homewares and a few clothes. All simple classics.

Lovely pub/cafe. Great atmosphere, best to sits outside 

A great place to start the day if you are in South London is Federation Coffee in Brixton Village. The food is great and so is the coffee. This is a very chilled place where you can get both and indoor and outdoor experience (even though the whole place is under the Village roof).