I think I had some serious jet lag.
I need to get myself into the habit of sleeping on a reasonable time and not falling asleep according to my past time zone.
I think right after I finish work in the morning, I need to just open my flashcards and study right away.
Or I need to go outside and go for a walk and resist the urge to go back to sleep which will mess up my sleep schedule.
I think I’ll have to do a combination of those two – after work, bring my phone and go for a walk.
During my walk, I’ll study flashcards with my smartphone.