The day becomes valuable when you remember you never receive the same one twice.

Days are not interchangeable, though they are easy to treat as though they were, since so many of them are similar. Each one is a specific and non-repeating allocation, and the fact that tomorrow will resemble it does not make today replaceable. This is not a reason for pressure. It is just an accurate way to look at a day.

Try taking one thing today that you would normally postpone and doing it instead. Not because the day is precious in a grand sense, but because it is the only version of this one you get. The practice matters more than the specific thing.