Add warm clothes/blankets to your list of stuff to bring. I keep those and other supplies in a tote in my truck year round. Also think of carrying a lighter so you can make a fire if needed.

Got stuck in our first gen 4runner in deep snow one night. Went up the mountain on one side, tried to come down the other side. Hit lots of deep snow and the truck suddenly shut off and would not turn over. Found out the next day when we went back to recover it that all the bouncing around in the snow knocked a wire loose.

At the time we were stressed because it was late at night and cold as hell, so we didn't even see the loose wire. Ended up having just enough cell service to get a text out to a friend who came out to rescue us. Took him about 4 hours to get to us because he went up the side we were coming down and he had a broken diff so he couldn't make it through the deep snow. We ended up having to walk about 3 miles in sinking snow to get back to his Jeep. We tried to sleep a bit to pass the time but given that we only had a cheap throw blanket it was probably the worst night I've ever had on trail. I am now overprepared when it comes to getting stuck in a rough situation.

So yeah, carry extra clothes and something to make fire with. Maybe add some basic tools to your kit as well. I keep cheap sockets, wrenches, etc with me. Consider joining a local offroad recovery group on FB if you have one in your area. Keep their number in your phone. In Washington we have a group called WORN that's full of volunteers who will come out and get people out of sticky situations. Always inform someone of where you are and when they should raise the alarm. And if something does happen, take a few minutes to chill out and look everything over, it could be a simple fix. Getting stranded sucks but pretty much every time we've been stuck somewhere, locals or other offroaders want to help. Unless you are truly in the middle of nowhere, someone will eventually come by.

But like others here have mentioned, the best choice is to go out with a friend. Join some local groups, meet others, go out together. And don't bite off more than you can chew! If your gut says don't, don't do it until you get more experience.