Financial, physical and emotional stress can bring a person down fast. You have to remember to get some "you" time in there to get away from it all. There are several hobbies one can do to help unwind.
Fishing is a great relaxation for many people, and it doesn't require much time or money to do. A fishing pole, fishing license, bait and water. Preferably the water has fish in it or else you could just do it in your front yard. The major plus about fishing is it gets you outside in the fresh air, near trees and water. Nothing is more relaxing then the breeze off the water blowing through the trees. You don't have to catch anything, just enjoy the air.
Hiking is another very relaxing activity. It requires no investment except decent shoes. I know a lot of people like to hike in flip flops and sandals, but really people, thats just asking for trouble. A snake bite, rock/tree cut and your foot is ruined. If you dont have hiking shoes, at least go with tennis shoes. Keep the toes closed in please. Before you hit the trail, make sure somebody knows where you are going, because most of the time cell phones dont work on remote trails. Check the weather, and don't hike on a trail above your ability. If you are out of shape and a smoker, avoid anything to put a strain on your lungs and body. You are doing this to relax, not die.
These are just a couple brief suggestions. Whatever you do, enjoy it, have fun, and relax.