It can be really easy to uplift your mood if you are not feeling great. The easiest way is just to remember an event that makes you smile or laugh. when you recall the event it should definitely lift you up from feeling sad/annoyed to remembering how happy you felt at the time.
Five other ways to lift your spirits if you are feeling low are:
Praise Someone Today. Find someone to thank, express love and/or gratitude to
Relax Your Mind. Just for 5 seconds to start with. Stop, breathe deeply and relax.
Clear out the clutter. Your basement, the garage, the attic (loft), your old clothes from the 70s! You'll be amazed what having a good clear out can do to help you forget!
Laugh. Take out your favorite comedy dvd movie or switch onto a comedy channel. Find a friend that makes you laugh.
Say something good about yourself. Right now. Yes right now as you read this say something good about yourself. GO!
That's a total of 6 ways to lift your mood if you are feeling unhappy and I hope they helped to make you feel happier.