I know that now after 10 years into retirement, I can easily piss away a day without even trying! Wake up late, have breakfast when ever, decide how I want to spend the day, lunch, that's it for the day, supper, cocktails!
I'm only 2 year in, but am finally settling into a rhythm. DW and I almost always sleep in late, then a slow "breakfast" around lunch time. In the afternoons, we do anything that "needs" to be done, but make it a point to keep the evenings open for chilling out, reading, movie time, etc.
Even in winter, hobbies, church, and socializing someone take out several hours each day. In summer, we're outside as much as possible.
For the first time since 8th grade, I'm actually getting enough sleep and am no longer "burning the candle at both ends". Life is great!