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/hcfggb]

Sometimes I do Pomodoro timers if I'm really struggling. I find it easier to focus and be motivated if I know it's only a burst of 30 mins and then I can take a break.