Time estimates are predictions, not measurements. They improve when you compare them with completed work and notice which parts were omitted. Travel, setup, waiting, and revision often take time even when they are not the main activity. Break the task into stages and use a similar past task as a reference. Record a range when uncertainty is substantial. After finishing, compare the estimate with the actual time and identify the reason for the difference. Keep the observation specific enough to reuse. If writing a short report took longer because the data was incomplete, the lesson is not simply “work faster.” It may be to verify inputs before committing to a deadline. Avoid judging an entire day by one estimate that depended on conditions outside your control. Practice: Estimate the time for a small task, including preparation and checking. Record the result and one adjustment for your next estimate.