The answers came in thick and fast from Twitter, on Facebook and in the comments.
Answers included sleeping, reading, doing homework, play games, spend time with the significant other, and having fun. Oh and probably complaining that we don't have enough time.
My cousin Boyd who is currently in exile in Austin, Texas; would...
"...I'd put on ma kilt and glengarry then play my bagpipes whilst looking out the window at the saltire rippling in the lack of breeze dreaming of eating a fish supper...and don't forget the Irn-Bru."Where as my dad made a great point...
"...I suppose it does not matter how long a day is we would just fill as we do at the moment. Perhaps it is just takes a bit of discipline rather than more time?"Personally... I would read more and spend time with Olly.
Thanks to everyone who answered the question. I'll ask another one soon.