• Understand what it is that will make you happy. Everyone has unique requirements for attaining happiness and what makes one person happy may be very different from what makes someone else happy. Revel in your individuality and do not worry about whether or not your desires are comparable to those of your peers.
• Make a plan for attaining goals that you believe will make you happy. Your mood will very likely increase as your pursue your goal because you will feel better about yourself for going after something you value.
• Surround yourself with happy people. It is easy to begin to think negatively when you are surrounded by people who think that way. Conversely, if you are around people who are happy their emotional state will be infectious.
• When something goes wrong try to figure out a solution instead of wallowing in self pity.
• Spend a few minutes each day thinking about the things that make you happy.
• It’s also important to take some time each day to do something nice for yourself.
• Finding the humor in situations can also lead to happiness.
• Maintaining your health is another way to achieve happiness.
  
• Finally, it is important to understand that you deserve happiness.

This list has been severely abridged. To read the full list, view the original post at it’s source:
9 Tips in Life that Lead to Happiness (Lifehack.org)