Wasting time is one of the biggest problems that faces us these days. Why? There's so much info. available these days that dealing with the deluge is what defines good usage of our time - to a large extent.
Reading fiction that is not tainted in any way is a great way to fire the imagination,likewise non-fiction that is uplifting gives food for thought. Seeing how others showed wisdom ,overcame adversity or showed great originality or bravery can make us think in a positive light.
For learners of English it is a great way to extend their vocabulary,to give them a greater sense of sentence construction and pnctuation. They should remember to read in a half voice - to enunciate the words as this helps retention of chunks of language allied to vocab retension.
So reading, a balanced diet of it,is one productive way to use your time. Seconds out!