1) Replace any negative thought with a positive one.
2) Listen to music and sing along
3) Go for a walk or do some kind of exercise.
4) Get a gratitude journal. You don’t have to get anything fancy even a notebook will do. All you have to do is at the end of each day write down five things that you are grateful for now matter how little it may see.
5) Surround yourself by positive people
6) Meditate even if it is just for 5 minute.
These are just a few ideas. What kind of ideas do you have or what has worked for you?