Sleeping and waking up

Time to write something more personal, for a change. I find it somewhat curious how my sleeping habits have changed over the years, as well as the level of sophistication of the way I have been waking up. Let me run a short recollection of how a teenager who tried to squeeze every single minute out of (morning) sleep turned into a young man who tried to optimize his sleep, and finally into a man who does not mind waking up much earlier than strictly necessary.
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