An idea to improve your concentration and therefore overall output is to change your writing environment.

Find a secluded area to set up your stall. Most find isolation a good idea, unless you are working as a team of course. You need a place where you can be alone with your ideas, and can work them through without distractions. A good maxim could be; Door Closed, Mind Open. Some writers fit out the shed with a light and a month’s supply of stationary and set to work, while others may take their laptop to a park bench.

Some find music helps. Heavy metal may put you in the right frame of mind if you are writing a heated exchange, and so on. Classical music seems to be the best because on the whole it is unobtrusive, and unless opera or choral, there are no words to muddle your brain and interfere with your own. I find the best noise is silence.

It doesn’t matter much where you find your sanctuary, so long as you find it.