Please, let me know winter life hacks/survival tips/things a Texan would not know about cold weather.

The first thing to keep in mind is that winter weather is quite variable. Where I live (MA), the temperature (in Fahrenheit) in the winter ranges from around -10 to +50. It's good to have ways to keep yourself warm at various points in that range.

Going down human anatomy, I would recommend:

Head

• A warm hat that covers your ears
• If you are into outdoor exercise, a headband to keep your ears warm; they can get very cold even if you're producing enough heat to keep the rest of your body warm
• Sunglasses; snow can cause a lot of glare. Make sure they have full UV protection (most do).
• Optional: scarf and/or ski mask; on the very cold days, especially if it's also windy, it can be helpful to keep your face covered.
• Chapstick; the air is pretty dry in the winter.

Torso:

• A moderately warm jacket and a very warm jacket, for varying temperatures; I use a modular ski jacket, which has an outer shell and an inner lining. The lining can be easily detached and used as a stand-alone jacket on less cold days.
• Sweater: depending on the temperature at work, you may feel you need one. Also, at home, wearing a sweater is a lot cheaper than cranking the heat up high.

Hands:

• Get a good pair of gloves. I cannot emphasize this enough. Preferably get gloves with some grip to them, to make things like opening doors easier.
• Moisturizing lotion; as mentioned before, winter air is very dry.

Legs:

• Most people don't really do much differently here.
• Optional: Long underwear can be helpful, depending on how easily you get cold.
• If you will be getting exercise outdoors and are male, wear an extra pair of underwear, ideally not very breathable. Why is left as an exercise for the reader.

Feet:

• Insulated boots are very useful, though not absolutely necessary. In urban areas, there are often a lot of puddles from melting snow, so make sure they're very waterproof, too.
• In a less urban area or on a large college campus where you may have to trudge through deep-ish snow, I would also recommend gators to keep the snow from getting inside your shoes.
• Snowshoes and spikes are unnecessary.
• Wool socks are helpful, depending on how easily you get cold.

Other things:

• I find a sun lamp helpful; YMMV.
• People spend more time indoors with less ventilation, so diseases spread more easily. Take precautions as appropriate.