The number one most important thing to do at any wagie job is internalize the fact that you are getting paid no matter what, by the hour, and that no matter what your manager says there is no incentive to work harder or work faster beyond doing exactly enough to not get fired. that's not your problem. I dont get paid more if I move more boxes. So why would I. Your wages are decoupled from the real value you produce so your work ethic should be as well