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There will _always_ be more to do than for which you can make time. It is a matter of priorities. Figure out what is important. Then figure out how much time you are going to spend on the important things. Set aside a fixed amount of time for chores too. This ought to leave you with some free time as well so that you can unwind from the day's labours and this is vital too. It helps the mind reset and helps you maintain the energy and discipline to go towards where you want to be.

It is not really complicated but it does require discipline and commitment. Like some other commenters have suggested, a complicated system or a massive to-do isn't as reliable as a simple system which is easy to follow and gives you a quick overview of where things stand. In my experience, To-do systems don't help motivate - they help a bit to stay organised.