Survival Basics
Don't Starve Elsewhere's core survival loop follows the franchise template. Klei's own announcement framing is: forage, scavenge, and build during the day, and fight off ravenous creatures along the way, especially at night.
Day
Forage for food and resources.
Scavenge anything useful left by the world or earlier characters.
Build shelter, tools, and defences.
Push out further into the multi-tiered world when conditions are safer.

Night
Night is when ravenous creatures come out in force. Even a well-prepared player can die quickly at night if they did not finish their preparations during the day.

