The plan that suits you should include the energy it takes to enjoy it.

Schedules get budgeted in time and money and almost never in energy. Everything fits on paper because the hours line up, and then the actual day asks for attention, patience and the ability to enjoy what you arranged, none of which were counted. What you end up with is a full schedule you are too depleted to be present for.

Look at your next busy day and ask which item you will be too tired to enjoy. Take one thing out, and treat the gap as part of the plan rather than as spare capacity. Judge the result by how much of it you were actually there for.