A single word is easier to remember and apply in the moment than a long list of resolutions, making it a quick filter for daily decisions throughout the year.
One primary goal keeps focus sharp, but you can still have smaller supporting goals as long as they don't compete for the same time and energy as your #1 goal.
This workbook starts with a full year's reflection and a guiding theme, then breaks it into quarters. A quarterly planning tool typically starts fresh each quarter without that annual reflection step.