For the people that said cold showers isnt helpful for willpower. This part of the satanic void meditation post.
"2. Add uncomfortable and/or awkward positions. Make sure these are taken from a Yoga or Tai Chi book, so that they are physically beneficial. This is a discipline that is taught in many Martial Arts schools where one learns to ignore pain, while retaining intense focus. This strengthens the mind for physical combat and drastically increases your sense of self-confidence. This will also increase your resistance to pain.
Many martial arts masters meditate under cold waterfalls, in snow or other painful conditions. One's physical health must be built up here, for obvious reasons. A cold shower can be substituted. As with anything new, be sure to start out gradual.
These techniques, when mastered, will give one total control over one's mind and emotions. If one faces death, one will not freeze up or panic with fear and the odds of one's survival will greatly increase."
source: https://templeofzeus.org/Zevist_Void_Meditation.php
Again, there is a time and a place for everything, but not now. Before giving advice about anything, since you still don't get there by simple intuition, be sure to study. In this case, study TCM and Ayurveda, and you'll understand why taking a cold baths/showers in winter in a non-tropical country is going to do A LOT MORE HARM than it does any good. Just like drinking alcoholics: the damage you do to yourself is extensive, permanent or semi-permanent depending on various factors (without years of meditation AFTER dropping the crap you ingest, not during) to the liver and the brain, the endocrine system and so on.
Those yogis have years of training on their behalf and didn't immediately start training with this meaningless stuff, as the body needs to be built up first. Secondarily, most so-called yogis (the modern ones) do counterproductive, if not outright harmful, activities too, like cutting their tongues, bathing after kundalini yoga, smashing their body into hard materials, and other stuff that, if doesn't kill you is going to severely damage you, making you weaker, not stronger at all.
Self-discipline isn't built by creating energy blockages and damaging yourself. It is built through positive reinforcement of several beneficial activities that you can include in your routine.
A reminder that this is Varg Idiotson's forum.