Make a pillow fort. Want to feel like you're in a cozy den while at the same time realize that maybe sometimes, life is okay? Pillow fort is your friend. Grab some chairs and some blankets and pillows and your favorite plushie, and voila, wolf in den.
Food. Now, I know there's a lot of different diets out there and not everyone can or wants to eat meat. And while it does certainly works great for food that makes wolf happy, it's definitely not a must. How about a berry salad (grey wolves, I see you and your blueberries!) However, if you decide to go with something meat based, here's a super secret tip. Ever wanted to eat raw meat because wolf brain said yes, but human guts very vehemently said no, you will die? Let me introduce you to German Mettwurst. Look it up and thank me later.
Nature sounds. Remember that pillow fort you may or may not be sitting in right now? Well, here's how to make the experience even more den-like. Grab your phone, or tablet, or whatever you have that makes sufficient and fitting noise, find a video of forest sounds and boom. Now with 50% more den-feeling.
It can be hard to get comfortable if your body is a lot less furry than it should be. However, there luckily is a remedy for this sin of nudity. Grab a blanket, or two, or five, and cuddle up. Also, from personal experience I can say that investing in a weighted blanket is one of the best decisions I ever made.
Sometimes you just need distance from it all. Grab your gear and head out to the forest, or to the park. If you don't wanna be seen, go at night (but stay safe!). If the outdoors isn't an option, turn off your phone, close the blinds, and watch a documentary. Let the whole world go quiet for a moment.
Floor time. Seriously. Dog go floor. Instant relaxation. Lie down. Sit down. Whatever you want. No need for chairs. Just plop down wherever. Tail wagging guaranteed.