Build a 90-day marketing plan your startup can execute

Begin with a diagnosis

A plan that starts with channels often becomes a calendar of activity. The company commits to posts, ads and events before agreeing which problem those activities should solve.

Describe the current constraint and the evidence behind it. Is the company struggling to reach suitable buyers, explain the offer, move opportunities forward or retain customers who should receive value?

If the diagnosis is uncertain, make the first phase an investigation. A plan can be useful without pretending the answer is already known.

Choose the outcome and the baseline

Define the change that would matter commercially within the quarter. Use the current baseline, customer economics and buying cycle to choose a realistic measure.

Do not select a round target solely because it looks ambitious. Work backwards from capacity and observed progression where evidence exists. Where it does not, set a learning objective and state what would justify a later performance target.

Keep one main outcome with a small number of supporting measures. A plan with ten equal priorities is unlikely to resolve tradeoffs.

Select the work that addresses the constraint

For each proposed initiative, explain why it could influence the outcome. Identify the audience, key assumption and evidence needed to assess the result.

For a hypothetical startup with qualified demos that stall around implementation, the plan might prioritise buyer research, an implementation guide and a test of a clearer evaluation process. More top-of-funnel content could remain secondary until the main break is understood.

Avoid treating every function as entitled to a project. The plan should follow the constraint rather than distribute activity evenly.

Assign the capacity

Name the owner, contributors, required budget and dependencies for each initiative. Include time for briefing, approvals, analysis and follow-up.

Check whether the same person is responsible for several projects that peak at once. A schedule can look feasible when tasks are listed separately and become impossible when placed on the same calendar.

Write down what will stop or wait. New priority work needs capacity, not merely a higher position in a list.

Divide the quarter into decisions

Use the early period to establish evidence and repair obvious blockers. Use the middle to run the focused work. Use the later period to evaluate, document and decide what to repeat or change.

The timing should reflect the work. Customer research and a simple page test differ from an enterprise buying cycle. Do not force every initiative into the same weekly milestone pattern.

Set review points before launch so a weak test does not continue indefinitely because the team has become attached to it.

Keep a short risk and assumption list

Record the conditions the plan depends on: available product capability, reliable data, sales follow-up, customer access or a key contractor. Name what happens if a dependency fails.

This makes the plan easier to adapt without turning every surprise into a new strategy meeting.

Review the quarter honestly

Separate work completed, evidence learned and commercial results. A shipped asset is not automatically a successful initiative; a well-run test that disproves an assumption can still improve the next decision.

The First 10 Diagnostic ends with a 90-day plan designed to be usable by the founder and team. Its value is in the choices, ownership and sequence, not the number of slides required to describe them.

Apply this to your business

Choose one quarterly outcome, three linked workstreams and a named owner for each. Remove work that does not support the current constraint.