This is a crisper and more tightly written version than one previously submitted (and now deleted, because this is better).
There was one comment[0] on the previous submissions in which slvv[1] said:
This kind of activity tracking and productivity management
is so helpful for students at a variety of levels. I wish
these skills were clearly and intentionally taught either
in high school or in early university! Even if everyone's
goals and patterns are different, figuring out what works
best is a HUGE asset. Your observations about your ability
to estimate are especially interesting!
There was one comment[0] on the previous submissions in which slvv[1] said:
[0] https://news.ycombinator.com/item?id=9522634[1] https://news.ycombinator.com/user?id=slvv