Developing a good work ethic but facing obstacles

[ActualizingBaby]

Hey everyone, 

   I am a newly graduated software developer who wants to do well at his job (but doing horribly right now) . I'm trying to develop a good work ethic but after some time of work. (20min-30min), my brain gets tired and just refuses to work for the next 30 minutes. I get overwhelmed with the number of things I have to do too . In the evening, my mind just gives up and I have a headache and feel numb in the head trying to work more and doing anything at all. I end up drinking or eating lots to suppress the numbness and sometimes sleep late too. 
    The pain only goes away after 1-2 days and then i get into a state of curiosity and wonder. But, I'm losing a lot of time between these .

 

How can I return to a state of (wonder and curiosity) whenever I want and have a good work ethic . Does work always have to be painful ? 

[universe]

What do you think about people who have a good work ethic. Are there some in your job or ones which you crossed path in your university?

How do you feel about your work right now?

[hyruga]

Change your environment!

If you go to a workplace, you will auto work because it's normal to work there!