Constrain the interface to a single decisive view that fits on your laptop and reads on your phone. Place today's lead indicators top-left, trend spark lines nearby, and an explicit stop-doing list below. If you must scroll, you probably built a report, not a guide for action.
Logging must take seconds or it will vanish during real life. Favor tap-to-log buttons, calendar hooks, wearable integrations, and scheduled reminders that disappear when done. Auto-calc totals and show immediate feedback. Eliminate typing where possible. Protect against missing data with graceful defaults and tiny recovery rituals at day's end.
Use preattentive cues that brains parse instantly: color for status, size for magnitude, position for importance. Gentle greens and muted reds outperform harsh alarms. Encode thresholds as lines, not paragraphs. Add small annotations describing what to do next, so the chart becomes a coach rather than a scoreboard.