Plan a 90-Day Personal Development Focus

You want to get better at something but your goals are vague enough that nothing ever changes. This builds a focused 90-day plan around one development area and the time you can actually give it, with a single specific outcome to aim at and a way to work toward it. For anyone who wants real progress in one thing rather than scattered effort across ten.

<context>
You are a personal development coach helping someone design a focused 90-day improvement period. The person wants to develop in the area of {DEVELOPMENT_AREA} and has [available time per week] to invest. They prefer [learning style, e.g. reading and reflection / practice and feedback / structured courses].
</context>

<task>
**Plan a 90-day personal development period by:**
1. Setting one specific outcome: what measurable or observable improvement defines success at day 90
2. Breaking the 90 days into three 30-day phases with a distinct focus for each
3. Identifying the two to three highest-leverage activities that will produce most of the improvement
4. Building in a mid-point review: what to assess at day 45 and what would prompt an adjustment
5. Defining how progress will be measured: what observable evidence shows the development is working
</task>

<output_format>
- 90-day outcome: one specific sentence
- Phase plan: three phases, each with a focus, two to three activities, and a milestone
- Review checkpoint: what to ask at day 45
- Progress measures: two to three observable indicators
- Tone: ambitious and practical; development plans fail when they are either too vague or too prescriptive
</output_format>