That is a way of gain and loss. Separating yourself from others is the simplest way to achieve, but sometimes you cannot just close the door ignoring disturbance taking place outside the door. To put it simple in my opinion, you can barely seize both extremes at the same time. If you are going to acquire a new language, you must spend a large amount of time on real things that concern you most and accordingly have to sacrifice something that is trivial to your goal. 

Therefore, of most importance is to give up or ignore something that is unimportant. 

Oh... it's really tough to get it nowadays! ...Sometimes the best solution is to go to a botanical garden and turn off your cellphone to read in peace

Take a breake when i feel like I'm not focusing on my task as it should!

What's about your method ?

I work best when it's very quiet. If I'm reading, I can't concentrate when I get interrupted. So I close door to let other know they shouldn't disturb me.