First off. If Internet goes down I have a http captive portal that do some diagnos, showing where the problem is. Link on network interface, gateway reachable, dns working and dhcp lease. Second, now when it is down, show the timestamp when it went down. Third, phone number to the ISP and city fiber network owner.
Forth. Watch my local RSS feed and email folder. Also have something to watch from Youtube or Twitch game downloaded locally.