Is 3 items enough for long-term product planning?

Focusing on three high impact tasks is super effective for daily output especially to avoid feeling overwhelmed. My main struggle with minimal task lists was always estimating task size sometimes one "high-impact item" turned out to be a three-day project in disguise.

Breaking bigger goals into daily sub deliverables really helped smooth that out. Do you plan these three priorities the night before or right when you start your workday?