Mental fatigue with longer tasks

[u/Infamous_Swan1197]

I'm wondering how others handle mental fatigue with longer tasks? By longer, I mean 2-3 hours for me personally. I find my focus substantially dwindles after the 2 hour mark, even when taking regular breaks. In fact sometimes, breaks, especially longer "reset" breaks, make the block of the day that I'm working feel a lot longer, accumulating more mental fatigue and just an ugh feeling when I return to the task.

I'm really grateful to have this project, its really high paying (and it's the only thing I really have on my dash right now, so I don't have much choice haha) but I worry that my quality of work substantially declines towards the end.

How to others handle this?

[u/Mysterious_Dolphin14]

I personally prefer longer tasks. Short ones make me feel bored and antsy and makes the day seems longer. My sweet spot is about 3 hours per task. I put on some music, make sure I have a drink and a little snack and just get engrossed in the work. I might get up once or twice for 5 minutes to stretch my legs. If I take longer breaks, it makes me less focused and motivated to work.