Edit: Wonderful information in this thread. Good work comrades! I'm proud of y'all :Care-Comrade:
Mods delete this if there's already a tip thread, but now is the time to share any information we can that can help people. I see good advice in the related threads, but I don't see one that's just dedicated to tips so I'm making this post.
Onto the tips:
If you have a tent, pitch it inside your house. It is a considerably smaller space to keep warm, and your ambient body heat will warm it.
If you don't have a tent, get bed sheets and hang them to create a "smaller room" within a room.
Sleep together in the same room with your other household members and pets. Your body heat will help warm the space.
Put your sleeping bag inside your bed and sleep inside that under blankets. Down comforters are great. Wool is great at insulating if you can deal with the itch and you aren't allergic.
Socks: Put on two pairs of socks, a warm insulating one on the inside and a thinner one on the outside. Put on your shoes (boots preferably) and pull the outer layer down over the top of your shoe. Snow will no longer fall inside your shoe. The only thing worse than cold feet is cold wet feet.
Fold newspaper into inch wide strips and pack it into anywhere cold air can seep in, like the bottom of the door. 3-4 large sheets can be taped over windows to provide extra insulation.
Layers layers layers. If you need to do any work outside peel off layers as your labor begins to warm you up. You do not want to sweat. You do not want to be wet. You can always put the layers back on.
Throw tomorrow's clothes in your bed with you to warm them up so you don't have to put on cold clothes in the morning.
Use every hour of daylight you have to prepare for the following dark. :af-heart:
If you have no water and no heat, do not eat snow for drinking water, it will drop your body temperature a lot. Let the snow melt first, ideally by heating it over a fire (dont burn stuff inside your house for heat), but if you dont have the means for a fire, just bring the pot of snow in your tent/insulated room. It will cool the room down slightly as it melts but its much better than putting that cold directly into the core of your body.
Since I havent seen any tips for pets ill try and give some.
Warm blooded pets, all mammals and birds: Bring them in your tent/warm room, and let them under the blankets to share your body heat. Smaller animals may need to share your body heat if your shelter isnt warm enough, it will depend on the species, you may want to sleep in shifts so someone can always be making sure the animal is warm enough while also being sure you wont roll over onto them in your sleep.
Cold blooded pets, reptiles, amphibians, invertebrates, and fish: For larger, handleable reptiles like snakes, lizards, and turtles, you may get through just by providing your own body heat to them, they will probably need direct skin to skin contact with you or another large warm blooded pet the entire time. Do not sleep with a constrictor snake using you for heat, its not safe, take shifts staying awake providing body heat, same as with small warm blooded pets. a lizard should be safer to sleep with, you may get scratched up a bit though. For invertebrates and small or dangerous reptiles, move their terrarium inside your warm room, wrap the entire terrarium in blankets, top, bottom and sides. If you have a fire going, heat objects over the fire that will retain heat, rocks, bricks, plates, etc. Bring them to a temperature that will not hurt the animal, for reptiles, if you can hold the object indefinitely without pain it should be okay. For invertebrates, you may not want it to be as hot, and you may want to bury the object in the sediment, they dont sun themselves or use heatrocks like reptiles do, but if it can heat up the soil in their terrarium they mat burrow into it and find enough heat to make it through. Replace the heat source regularly as it will run out, take sleep shifts to do this. For fishtanks, bring the tank inside your warm room, wrap the tank in blankets, top, bottom, and sides. Find the same objects you would heat the terrarium with, but place them outside of the tank between the blankets and the glass, water conducts heat better than air or soil does, so putting the object directly in the water may overheat the tank. Pay close attention to the thermometer, add or remove fire-heated objects from in the blankets to keep the water at a tolerable temperature for your fish.
As for both aquariums and terrariums, if you have a generator but can only supply so many things with power, your pet's heat rock/sun lamp/tank heater should be one of them. It will also provide you with heat as it radiates away from the enclosure and into the warm room around you.
The idea of fire-heated objects for inside warth came from the Beau video someone else posted in this thread, please watch it because it goes into greater detail on how to do it safely. Ive only come up with how to apply it to keeping pets alive.
Ive come up with most of this on the fly, so dont take my word as a final authority. If anything ive said is doing more harm than good, stop doing it, and if anyone else here knows better please correct me.