Have you something to do tomorrow; do it today.
Franklin advises completing necessary work as soon as there is a reasonable opportunity rather than postponing it simply because the deadline lies in the future. Acting today reduces the risk that unexpected demands, changing circumstances or further responsibilities will make the task more difficult tomorrow.
The saying reflects Franklin’s broader emphasis on industry, preparation and careful use of time. It does not mean that every future task should literally be completed immediately, since planning and priorities still matter. Its target is avoidable delay: when something can usefully be done now, postponement may create unnecessary pressure later. The broader lesson is that prompt action can preserve flexibility and reduce dependence on uncertain future circumstances, while procrastination often turns manageable obligations into urgent ones.