The point is to get out and go somewhere and do something YOU ENJOY! It doesn't have to be kayaking or canoeing. It can be just taking a walk. Physical exercise is mental exercise so are non-physical activities. It will seriously elevate your mood if you're down--not doing too well. Do NOT isolate yourself. The enemy would love for you to do that! And love for you to tell yourself negative stuff all day long--to further worsen your depression.
One of the simple activities I enjoyed as part of my routine schedule at the first couple of places I stayed during my earlier depression episodes was occupational therapy. I remember the group of us going to a room somewhere else in the facility that had all kinds of fun crafty stuff to do. At first, I thought it was dumb and boring. I mean, I was an adult! What in the world could designing plastic beads and melting them together do for me right now?! Well, it seriously did wonders. I relaxed. I'm an artsy fartsy person anyway and love to be creative. I'm not me if I can't create something without too much time passing. I was able to visit with the other patients--"Hey what are you in here for." It was that kinship I've talked about before. Yes, it sounds like what people in jail would ask each other perhaps. But talking to others with problems possibly like your own is a comforting feeling.
Believe it, or not DOING some kind of activity is healthy for our brains. Grab some friends. Okay, maybe you don't feel like grabbing anyone---I get that. You're depressed possibly. All the more reason to GO OUT OF YOUR WAY TO HELP YOURSELF. Don't read depressing books. Don't watch depressing movies. Don't wallow in personal deprecation. You need to do positive stuff on a regular basis. Schedule regular weekly or monthly activities with your friends or family to get you out of the house. And you can't say, "No", when they come to call. I know you want to say no a lot when folks try to get you out and about. It's natural for depressed people to do that.
What makes you relax? Meditation of the Bible? Take a long hot bubble bath with candles? Whatever is your thing you enjoy---just do it!