Do something fun! Something you don't usually do. Shake it up!

Take a walk in the woods.

Go to a shelter or pet store and visit the animals.

Sing karaoke.

Play.

Or work if that's fun – work on a project you put aside, such as a business plan or a quilt or woodworking project.

Go to a ball game with a friend.

It doesn't much matter what you do. Just break your usual patterns that are contributing to your depression.