1, If you need peace and clarity in your mind, try a walk in nature, you'll be amazed how the trees and forests comfort you, or why not take a trip to the sea... breath in that salt air with bare feet.
2, Set intentions for good things and feel how positive it makes you feel..
3, Pay close attention to the things you do everyday and notice the good positive things
4, Mediation is good. Find yourself a peaceful comfortable space and just relax into your breathing, notice where your thoughts go.
5, Put visual reminders around your home, maybe photos or post it notes with messages for you to read as you go about your day
There are many ways you can keep positive, where there is a negative you will always find a positive.