Now, let's be realistic. We aren't always going to be happy all day everyday for the rest of our lives. Yes, that'd be nice but it's the experiences that we gained from situation weather if it's when we are happy or sad that made us change and develop to a better person. I am ashamed to say this, but I was a pessimistic person when i was younger. I looked at all situations in a negative light and always turned down opportunities that were given to me. I don't know why I was like that but I most certainly didn't like the person that I was and I wanted to be happy. With that being said, it's okay to be sad or angry when you need to. You need explore these emotions within you and then, learn to look at the situation in a more positive perspective.
Be around positive people
Negative people will drained you and and take the positive energy out of you. They are the people that never support you and always drag you down. It's important to recognize these people in your life and best to eliminate them from your life. At the end of the day, your well-being always comes first. If you have a friend that is a negative person to be around with, you have two choices; you can end the friendship or you can sit them down and talk to them and hope that they realize their negative behavior is affecting you and changes their attitude. It's harder if you have a family member that is a bad influence for you because you cannot just cut ties with your family. If this is the case, you need to stand your ground and tell them that until they can respect and support you, you are not going to let them influence or give opinions on your life.
Do what makes you happy
Ever heard of the cliche quote, "Do what you love, love what you do?" It is a very true statement. You will never be happy if you aren't doing something that you are passionate about. If you have a dream or ambition, don't ever stop giving up on it. Everyday, make small goals towards it and I promise that you will feel satisfied once you have achieved it. When i'm in a bad mood, I would draw or design and it instantly makes me happy because I want to one day become a fashion illustrator/designer and i'm doing something about it.
Trick your mind to be positive
If you want to be happy, be happy. I know you're thinking it's easier said than done but it is,that easy. Positive self-talk is your best friend. Every morning when you wake up, tell yourself that it's a brand new day and you're going to have a good day. When you're getting ready, look in the mirror and tell yourself that you're beautiful. When you're up and about and something doesn't go your way, acknowledge it and move on. Search for the silver lining. Always look for the positive in a negative situation. Ask yourself, did you learn anything from this? A trick that i always do before bed, is that I'd come up with three things that happened during the day that were positive. It doesn't matter if it's something big or small, acknowledge it. There's an app you can get that's called Gratitude Journal 365, I'd definitely recommend this. You put down a list of things or pictures that makes you happy and you can always look back later and remind yourself all the happy memories that you've captured.
Let it go!
Stop dwelling on the past. The past is the past, you'll never get to relive that moment again. One of my favorite quotes is "Forgive and forget." Don't hold onto grudges, it will only make you more angrier and sad. Forgive the person that hurt you and forget about them. It's not worth your time and there are bigger things in life to worry about.
Keep preaching to be happy and you'll be satisfied with your life. Don't forget to look after yourself, you are what you eat and make sure to exercise regularly too. On an end note, "Every day may not be good, but there's something good in every day."