Sometimes, when doing research, we find going in circles. We keep hitting a wall. We run faster and faster only to find we hardly moved. That's where I was this past two weeks. I found that I loose interest quickly if I cannot see the goal. Or I can see the goal, but I cannot see the next milestone. The solution I found would be to look at the research roadmap and figure out where to go from there.
I also found that I am very vulnerable to mental fatigue. Tedious, repetitive tasks (like editing and converting videos), reading too much (so. many. papers.) or thinking about one particular problem (like algorithm design) pound my poor brain into mush. The solution that works for me is to switch tasks; when I start to feel fatigued, I go do something else, preferably something very different from what I was originally doing. Hobbies become very critical for maintaining sanity.
It's nice to see that I can still learn something new about myself.