https://docs.google.com/spreadsheets/d/1DvNDTmy_4P72C1ly4xMYItO6gb17EtdI3XuHFzAcX4Y/edit#gid=1353594331

This is the rotation map that changes whenever the rotations change. I hope this is timed exaclty how it is on PC, otherwise please inform me.
It contains the specific material types on each rooms, items like comic pages and crafting metals as well.
This spreadsheet also has a tab of addtional resources, and lots of other info.

https://pastebin.com/kk1y8VHR
This was a FAQ for the old /lidg/ on 4 channel's /vg/ board, should contain some tips that would be wise to go over, some might be a tad bit outdated.

https://www.letitdiethegame.com/news
Official News, though usually you'll see this stuff in game when you boot it up. Check it often so you can prepare for future events.

https://letitdie.gamepedia.com/Let_It_Die_Wiki
English Wiki, significant portions not covered or stat values on some equipment not on the site. If you find something out and it's not on there, please edit the wiki.
Thank god it isn't on Wikia.

https://www.reddit.com/r/LetItDie/
Pretty self-explanatory, ask questions on their weekly questions thread and admire all the issues people are having with the pc port/grind

Remember: