How to keep decks in proper condition?
Buy two or more of the ones you use the most if you're worried about it. That's the main thing. Most people are not worried about decks getting damaged but regularly used decks reach a point where the sides get so grimy they're a bit disgusting.
I have a grimy, filthy Greenwood which I'm not sure everyone would be comfortable about touching. I also have a pristine, untouched one. I never do any "spiritual" cleansing.
I also make sure that, when transporting them, I have good protective cases, bag, reading cloth etc so they're well protected.
But if they're back ups, I'm a lot more relaxed about what happens to them. Having two or more copies changes the way you think about a deck. At least it does with me.
I actually very rarely use decks I only have one copy of!