but we won't get better. Isolating ourselves and force-focus is not the key. I don't know a lot about the subject OP's referring to but to get good score all you need to do is understand things. Self study may not help at this time, have a friend over who is more or less like you but try and study together.

I'm just like OP. Recently I gave exams and if I hadn't had my friend over for studies then I would have failed. Now I'm getting a decent score.

I have learned something today, "To lose false confidence in me". You have opened my eyes.

I was fiddling with scripts and browsing all day long just before my physics exam. Can you believe it?

All the best ;)