5 years ago our province was struck by a big earthquake. Buildings were mostly safe and undamaged however the power plant supplying electricity for our province was heavily damaged. We were left without electricity for over 3 months and thus no internet.
Those 3 months were the hardest part of my life as before that incident I am relying too much on electricity and internet. I am somewhat introverted so I spent most of my time indoors, just watching tv shows and browse the internet.
So what I did at that time (or was forced to do) was:
1. Read Books - Even if you hate reading, you'll be surprised that without distractions such as the internet, you will end up picking up a book just to pass by some time.
2. Play Indoor Games - I learned so many indoor games back then like Card Games, Scrabble, Snakes and Ladders, I even learned "Mah-jong"
3. Get into Sports - I also did some games such as Badminton
4. Visit Other People's House
5. Went on a Road Trip
So yeah these was some of the things I was forced to do during the whole 3 months without an internet thing (electricity). I am not answering this hypothetically, I am answering these one by experience. :)