Freer Thinking Before Sleeping
I find that every day before sleep, I find myself thinking about all the things that could be done, without much constraint of if they are possible in reality. It's like how it must be before dying. That now that it's all coming to an end, might as well think through all that could've been. Given the awareness of not having to worry about about action or so called "practicality", imagination is able to think properly.
While the end of life itself probably indicates a more definitive termination of the way one has been carrying on, the end of a particular day might propose ideas for what the next day could be. Seth Godin has a popular quote on this: "If you could do tomorrow over again, would you?"