There is no 1 thing in life that guarantees happiness. Everyone is different, so different things make us happy. Understand what happiness means to you, and figure out how you can achieve it. Keep it in the back of your mind for when you really need it, to keep yourself grounded.
What can you is make a list of everything in your life that makes you happy. It can be anything, from family and friends, to your favorite childhood memory. If something comes up that upsets you, refer to the list and focus on the happy things in your life.
Turn your dreams into goals and start working to achieve those goals. Remind yourself that achieving your dreams will not be easy, but your happiness in the end will be worth it. Know what you want and why you want it, then put everything you have into reaching it.
There is always something beautiful right in front of you. Take the time to observe the beauty of something, whether it is your relationships, or nature. The appreciation for something much larger than you is the Key to leading a happy and positive life.
Think about all the sources of negativity in your life. Happy people have no room for negative thoughts.
Early on I learned that there is no negativity in life, everything happens for a reason, figure out what it is, make it work for you!
Have a happy, prosperous week, Keep the Faith!