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:
Whenever the power is on charge all critical electronic devices and do your meal prep/cook while the power is on. Cold food is better than no food.
To keep food from spoiling, set the fridge and/or freezer to the coldest setting and avoid opening it during the blackout and open it sparingly while the power is on. In the Texas situation, it is below freezing outside so you could put your food in a secure container outside and even bury it in the snow if necessary to prevent it from spoiling.
If an internet connection is critical, you can rewire/combine a router power cable and usb cable to power a WiFi router from a powerbank.
My country has a rolling blackouts schedule uploaded by the power producer telling you which areas will lose power when, so you can plan around it where possible.
If the water supply is not working, you can make a water filter though out of half a soda bottle, some aquarium rocks/gravel and activated charcoal at home though that will do a pretty good job. This is the basic idea, though I'd use a lot more activated charcoal if I were to build it. You can use it to filter melted snow or tap water that is not being treated. I've made a few of these before and they in fact do work.