Even if you've never noticed, it is very probable that at least once a day, you've let go because of procrastination. Could anyone deny have been procrastinating one time in the last week? 
To close to the point is that moment when you arrange to do something and suddenly you meet yourself doing whatever another thing, postponing your main task. It sounds a bit familiar, isn't it?
Well, to not hope fake expectations, I must have to tell you: I don't have the desirable solution. But I only want to speak about that little common problem. Maybe, if we think about it and don't refuse that it is a kind of obstacle that we just put ourselves in front of us, we won't prevent but surely we achieve to set some personal alarm to avoid it. 
One thing it happens to me when I realize I was procrastinating is the big (even unexpected) amount of wasted time that I had spent. Spent on what? Here it starts such a variety of tasks that catch me before or in the middle of the main action. For example, I have to write an article for delivery at the end of the day, and "surprisingly" I find a video on YouTube about life on Mars, and invest all my busy hours on that! Or I have to finish that brief for a new project and it naturally seems as if I like to do cleaning or washing the dishes. 
This innocent behavior does not allow us to be productive or to make what we want. Because of that, I'm trying to keep these attitudes: If I had to do several things one day I would list all of them (from the most irrelevant to the principal) and I would order according to a hypothetical but eventually real way of action. In this line, when I'm about to start a new project or something that means a great effort and is mandatory, I put great attention on making an honest and challenging plan. It must have aims to achieve in a certain amount of time and also a necessary space of relaxing (and freely procrastinate). And the last and hardest step to do: if I'm starting a strong workday, I will turn off all the devices or apps which are obvious they will distract me. 
I know it's a bit difficult following these recommendations, but let me advise you: being more aware of this it will make you a better professional and get more out of what you will do -and really won't do- with your time.