Take up woodworking, carving, learn calligraphy and make illuminated manuscripts, make a study of a topic that interests you, take an on-line class, write poetry, learn to sing, play an instrument, draw, paint, learn to make cut glass windows, restore an old car or vehicle, cook, learn Latin or another language, put on rain gear and go for a walk. Follow the same route everyday and become closely acquainted with the natural world...
DO NOT play video games, except, perhaps chess. If you turn on the TV or computer, let it be for a specific reason. Don't "surf" here and there. It's a waste of precious, God-given time.
Of course, pray!