When a course is going badly and you need to make a hard call

These are the four most painful rules in this document. they're about admitting that something isn't working and making decisions that feel like failure. They're also the rules with the biggest grade impact, because the alternative (continuing to pour hours into a sinking course) is what produces the worst semesters of your life.

If you're reading this in panic, this is the section to start with.

Rule 16 — When two exams pile up because one moved, and either course drops your lowest exam, deliberately take a zero on one and put 100% of your time on the other.

This rule sounds insane. taking a zero on purpose feels like giving up. but the math is unambiguous and almost no one runs it.

Rule 17 — When you score below 50% on any assessment worth ≥20% of your grade, run the math within 24 hours. If the required minimum on the remaining work exceeds 90%, formally lower your target grade.

this is the most uncomfortable rule on the list and the one with the biggest impact on your semester. when you bomb something major, do not let emotion or instinct decide what happens next. run the actual math.

Rule 18 — When a prerequisite course gets harder than expected, prioritize it above ALL non-prerequisite courses, even ones with closer deadlines.

Your instinct is to prioritize whatever's due soonest. that instinct is almost always wrong when a prerequisite is involved. a failure in a prerequisite costs you a full semester of delay. a lower grade in a non-prerequisite costs only GPA points. the asymmetry is roughly 100:1 in downstream consequence.

Rule 19 — When you drop a course mid-semester, explicitly reassign the freed time blocks to specific courses within 24 hours. If you don't, the time evaporates.

You drop organic chemistry on October 15. you just freed up about 8 hours per week (3 hours of lecture + 5 hours of study). most students feel relief and think "oh great, more time." within two weeks, those 8 hours are gone and they can't tell you where they went. they didn't go anywhere productive.