If you've already gone through the available demo of Pokemon Sun and Moon once, you might want to try to go through it again. And again. And again.
Fans who have been spending some days with the demo have attested to the fact that there is a lot more to see in the demo if you keep coming back for more. One fan over at Reddit has created a thread that lists down all of the items that a player can obtain in the demo alone.
Note that this is important if you are thinking of getting the full game. Some of the items, such as those mentioned above, can be transferred from the demo straight to the main game.
Apart from the items, fans can also check back every now and then depending on the calendar created by Redditor DaRk_ViVi. From the looks of it, days 1, 5, 12, 18, and 24 have events related to them.
Some actions, such as talking to a man outside the Pokemon Center will award 10 Pretty Wings. The 12-day event can net the player a Balm Mushroom for talking to a man with a Pikachu in Hau'oli City Hall. Finally, the 24th day of visiting can give players the Comet Shard for seeing the woman inside he Ferry Terminal.
The Reddit thread also introduced the glory of the Mysterious Old Man. Even though it's likely a useless bit of encounter, Pokemon Sun and Moon promises a different conversation or message.
This is a pretty good way to while the wait for the official release of the game. Considering that the calendar-based events almost last an entire month, it might just fit your schedule nicely. For those who haven't started yet, the Redditor did state that even though players can't cheat the Nintendo 3DS time, it seems that the events are counted from when a person was able to finish the demo.
Pokemon Sun and Moon will be out on the Nintendo 3DS on Nov. 18.