[matwood]

There's a mindset/inertia factor at play. Maybe you and others can pick and choose which discomforts to do, but for many little changes impact other areas in their life. It's like when people start working out, they tend to eat better.

So something like a cold shower leads to next uncomfortable thing being easier and so on. The inertia part is why I workout first thing in the morning, and why I feel like Jiu-Jitsu has done more for my well being than anything else I've ever done. They are relatively safe, controlled ways be uncomfortable daily which spills into every other area.

Now, does this automatically mean success? Of course not, but I'm sure we can all think of at least one thing that's uncomfortable that we should be doing to make our life better. If a cold shower helps someone do that thing, then good.