Mindfulness is a type of meditation in which you focus on being intensely aware of what you're sensing and feeling in the moment, without interpretation or judgment.

 Exercise 
Work out regularly or do a jog for 10 minutes a day. It will reduce the risk of depression and anxiety. Mood swings? Go exercise. It can improve your mood and sets your day. 

Take a Break
Relax yourself. Get away from stress. Indulge it with leisure activities. Have more fun. Release the serotin hormones or the happy hormone. The one who is responsible for being happy. Free yourself from worries. 

Don't sulk down on your problems
Talk about it. Release the burden and negative thoughts. Share it with trusted people. It can help lower the stress. You can also consult a psychologist or therapist near your place.