how to stay focused and productive in my PhD? [duplicate]

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• How to avoid procrastination during the research phase of my PhD? 17 answers

I am in my second year of PhD and I develop computer models of human behavior. I had 3 conference papers in my first year, but to be honest the only real work I have done was done in 2-3 weeks prior to deadline of those submissions due to extreme stress and pressure.

I have tried to work every single day. After each submission I promised myself I will be ready next time and I will try to have my materials ready at least one month before each deadline, but it does not work for me.

I go to office everyday, I only search for relevant materials. I don't spend time watching movies. I say no to most social invitations. I always feel guilty of not trying enough. I meet with my supervisor every week, but I don't think these meetings are helpful. sometimes I feel like I need to spend 1 or 2 months away from my supervisor without any weekly reports to do some real works.

I am kinda all or nothing person. If I want to learn a new programming language I learn everything about that language even if I don't need everything. I am a sequential learner too and that might be the reason for my ongoing search for all related papers which will never end. I need to know about history, social science, political science, and many computer languages. Those abilities were extremely helpful in my master and BS degree (CGPA > 3.9 for both) , but I think I cant follow same approach for my PhD.

Any idea on how can I go on for another 2 years without losing my mind and stay as productive as when I am under pressure for submissions?