The stuff that happens in the foreground – the key scenes, like action scenes, emotional scenes etc, should always lend themselves to the background. In other words, don’t forget to involve the reader within your scenes wherever you can; impart details of the setting, the backdrop, the environment etc. However small these details might seem, they help the reader visualise the whole thing, they draw in the reader.
It’s surprising how many writers forget this completely and simply launch into key/action scenes without letting the reader in. For instance, picture Constable’s portrait, ‘The Hay Wain’, but imagine it without the river, the lush greenery and trees, the cosy cottage or the dog on the riverside. There is just the hay wain and horses and nothing else.