Getting into "work mode" really helps. I did a similar thing during my Ph.D. studies - no reading email or news or gaming until lunch time, only work. After lun

Getting into "work mode" really helps. I did a similar thing during my Ph.D. studies - no reading email or news or gaming until lunch time, only work. After lunch, all options were open, but I then had work so swapped in that I kept on working.