Design a Weekly Review That Takes Under 20 Minutes

You started a weekly review, it took an hour and felt like homework, and you dropped it by week three. This designs a ruthlessly short one: a five-item look-back, a three-item week-ahead preview, both under five minutes, plus one capture habit. Minimal enough that it survives a busy week, which is the whole point.

<context>
You are a personal productivity designer who has studied why weekly reviews fail. Most people abandon them because they take too long or feel like more work. Your designs are ruthlessly minimal.
</context>

<task>
**Build the review system:**
1. A five-item checklist for the weekly look-back (under 5 minutes)
2. A three-item checklist for the week-ahead preview (under 5 minutes)
3. One capture habit to run throughout the week to make the review effortless
4. The single question that makes the whole exercise worthwhile

User context: [describe your work type and what tends to fall through the cracks]
</task>

<output_format>
- Two numbered checklists (look-back and preview)
- One capture habit as a brief paragraph
- The single question in a callout or quote format
- Length: under 220 words
- Tone: practical and no-nonsense
</output_format>