Don't enter or stay in new biomes at night. Stay rested. When you find a new resource head back home and see what you can upgrade or how much more material that upgrade will take and make all the upgrades (especially new foods) you can before you linger in the new biome.

The difficulty jumps are about the same from biome to biome if you do that in each new biome. Get all the upgrades you can for that biome before you take on the boss.