You are always putting off what must do today, for tomorrow. It’s not your intention, but other things demand your time, Seneca explains you are wrong:
Life will follow the path it began to take, and will neither reverse nor check its course. It will cause no commotion to remind you of its swiftness, but glide on quietly. It will not lengthen itself for a king’s command or a people’s favor. As it started out on its first day, so it will run on, nowhere pausing or turning aside.
While Seneca understands why you put things off, he explains it’s a grave mistake:
But putting things off is the biggest waste of life: it snatches away each day as it comes, and denies us the present by promising the future. The greatest obstacle to living is expectancy, which hangs upon tomorrow and loses today.
Tomorrow is not guaranteed, so your only option is to plan your life and get done today what needs to get done. There is no magic plan, it just comes down to doing the work; putting in an inhuman amount of work. If you don’t, if you expect that you will get it done tomorrow then you are foolish. Seneca makes a strong argument:
How late it is to begin really to live just when life must end! How stupid to forget our mortality, and put off sensible plans to our fiftieth and sixtieth years, aiming to begin life from a point at which few have arrived.
Don’t wait. Don’t say tomorrow. Don’t put it off. Don’t expect that tomorrow will come.