Why I'm able to study 4 hours with NO breaks (how to stay productive)

When you plan the time in the night before tat you have to study what things from the next time, it saves a lot of time. Plus, there will not be any confusion on what to study and hence less distraction.

Every time you will get up from your desk, you are gonna give yourself an opportunity for distraction. This can lead to a total disaster as you know it. give yourself reasons to study. Get up only when you need to. Take water and some foodies with yourself and maintain at least 1 hour streak. Whenever get up, stay focused.

Your phone is your real enemy. Get it away when you are studying.

Make it out of reach: Put it somewhere where you can't get it easily.

Make it invisible: Hide your phone so that it is not visible when you are at the desk.

This will really bring motivation for study. You may become more and more frequent. The biggest reward will be satisfaction. And it works.

When you study more, you get to know your standards. So when you study less, you will realise that you have done more before and you are capable. And so you will have less excuses.