Use a focus timer to protect attention
A focus timer is most effective when the environment is simple. Decide the outcome, silence interruptions, start the clock, and use the session count as a lightweight measure of progress.
Remove distractions
Use a clear duration, choose one outcome, and start immediately. Keep distractions out of reach until the session ends.
Measure completed sessions
A repeatable rhythm is more useful than chasing a perfect schedule. Adjust the length to the task and protect your breaks.