Glossary
Plain-language definitions for the concepts behind goal-setting, self-directed learning and personal productivity — what each term means, why it matters, and how it's actually used.
Personal Operating System
A personal operating system (personal OS) is a connected set of habits, tools, and review cycles a person uses to turn goals into consistent daily action — not a single app, but the whole loop of planning, doing, and reviewing that keeps effort pointed at what matters.
Skill Tree
A skill tree is a structured map of the smaller skills or topics that make up a larger skill, arranged so it's clear what to learn first and what depends on what — turning a vague goal like "learn Spanish" into a concrete, ordered set of things to actually work through.
Mastery-Based Learning
Mastery-based learning means a learner moves on to the next skill only once they've met a real, defined bar of competence in the current one — not once a fixed amount of time or number of sessions has passed. Progress is measured by what you can actually do, not by how long you've studied.
Weekly Review
A weekly review is a recurring process — usually done once a week — for evaluating what happened, what stalled, and what should get attention next. It's the reflection step that keeps a plan connected to reality instead of drifting from it silently.
Next Action
A next action is the single, concrete, physically doable step that moves a goal or project forward right now — not the goal itself, and not a vague intention, but a specific task you could start in the next few minutes.
Spaced Repetition
Spaced repetition is a review technique that schedules when you re-test yourself on something based on how likely you are to have forgotten it — reviewing just before you'd otherwise forget, at gradually increasing intervals, instead of reviewing everything on a fixed daily or weekly schedule regardless of how well you already know it.