Quarterly planning may not be suited for every business or professional. Breaking your year into three periods of four months provides more flexibility and allows for more synergistic, cohesive, and focused goals.

When you leave the corporate grind for the loose, unstructured entrepreneurial life, you leave behind the need to show up anywhere in person, report to anyone, get dressed for the day, or plan for vacations—because every day is a vacation.

Research shows that our bodies obey what are known as ultradian rhythms: ninety-minute periods of focus at the end of which we cease to operate at our highest ability.