Writing things down helps you remember them later, but it's also a great way to keep yourself from getting distracted. If you often find your mind wandering when it should be focused on the task at hand, keep a "procrastination pad" to jot down those fleeting thoughts and look them up later.
Redditor arcanooito says he keeps a notepad whenever he's studying to write down things that he has to look up or do later. And Zala Zia codifies the process at Dumb Little Man with the aptly-named "Procrastination Pad".
All you need is a small and unserious notepad onto which you will jot down every tiny thing you think of that could potentially distract you from the task at hand. When you have a spare moment, and ONLY when you have a spare moment, allow yourself to review the list on your notepad and do the things you have time for. Whether it is reading that article, checking phone messages, or 'quickly' visiting that website -- whatever it is, put that naughty little distraction safely to bed on the Procrastination Pad.
Simple and easy. It might be worth it to take the fun stuff from that Procrastination Pad and put it into a "nice-to-do" list for an off day.
6 Easy To Install Productivity Habits [Dumb Little Man]