sitting down and just working flat out isn’t actually all that great for you. i used to do that, but bit by bit the distractions came along. now, what i do is study by the pomodoro method. 25 minutes study, 5 minutes break. and even then, if you’re in the right mindset and can carry on going, go for it! that’s what i do anyways. i tend to start with the 25:5, but then end up going to 45:5. but in the morning i do 2 hours flat out. it’s finding out what works for you, but long periods flat out aren’t always as good as they seem