I think one of the most important things in life is to forget.
As we live along, things accumulate, and the momentum becomes a killer rather than nurturer of new initiatives and unexpected twists. We start to tacitly assume that today is going to be something like yesterday, where, even if there is to be some sort of change, it is going to be at best incremental.
It is advisable therefore to forget that you have been living for these "x" years. You are entitled to feel as if you were born today. You are allowed to start things all over again, without necessarily tracing the thing that has been burdening you until yesterday.
Assignments and promises can be reducers in the endeavor to freshly start. Therefore a day, or even an hour without anything specific to do is a godsend, since you would have a free hand to do whatever you liked to do. Imagination is the only limit, and
the problem is that imagination is not wild enough most of the time.
Even if you pretend as if you have forgotten everything, there would be a continuation of neural dynamics, so that consistency is more or less maintained. Forgetting does not constitute a discontinuation of dynamics. It is just a small tiny mode change in the evolving process that goes on anyway.
So try to forget. Act as if you were born today, with brand new ambitions, dreams that are bold beyond reason, and a daredevil ignorance of what tomorrow brings.