Distractions can be a variety of things such as email or social media notifications, pets, a radio in the background or even an untidy workspace. Every distraction, however small that may be, makes you quickly switch the focus of your attention, and it takes some time to regain productivity.
You may not be able to eliminate every distraction, but if you shut down all browser windows and put your phone on silent, it will help you keep focused on the task you need to get done.
Whether you have your own office or are working at the kitchen table, ensure your working area is tidy. Before you start get all your tools, including a brew or glass of water, within easy reach.