I started doing this just a few years ago and found that, like most things, practice and experience helps. I am very much still learning!
You need the courage to stand there and shoot, and you also need to be able to pick a location with good light and have the ability to recognise an attractive pattern formed by the people/objects within the shot. I tend to find a spot and pre-focus, relying on depth of field to get a result. I typically shoot with either a 28mm or 42mm equivalent focal length and generally have to take several shots in order to get one decent result.
Sometimes I wil