1.Don't set fire to the forest
2. Don't add to much fuel to your fire.
3. Do not attack beehives
4. Do not attack the PigMen
5. Pay attention to your Hunger
6. Do not attack frogs if there are more then one in an area.
7. If you see a portal....If you see a portal tell me because I jumped in one and have no idea how to get out.
8. Build your science machine close to resources.
I survived 5 days which is around 2 hours and these are just my limited experecnes.