Even a happy life cannot be without a measure of darkness, and the word happy would lose its meaning if it were not balanced by sadness. It is far better to take things as they come along with patience and equanimity.
The more closely you follow divine guidance, the greater will be your happiness here and for eternity-- moreover, the most abundant your progress and capacity to serve. I do not understand fully how it is done, but that guidance in your life does not take away your agency. You can make the decisions you choose to make. But remember, the disposition to do right brings peace of mind and happiness.
Richard G. Scott
"The disposition to do right brings peace of mind and happiness."
...coveting, pouting, or tearing others down does not elevate your standing, not does demeaning someone else improve your self image. So be kind, and be grateful that God is kind. It is a happy way to live.
Realize that true happiness lies within you. Waste no time and effort searching for peace and contentment and joy in the world outside. Remember that there is no happiness in having or in getting, but only in giving. Reach out. Share. Smile. Hug. Happiness is a perfume you cannot pour on others without getting a few drops on yourself.
As you do these things [referring to the standards discussed in the LDS "For the Strength of Youth" pamphlet], the Lord will make much more out of your life than you can by yourself. He will increase your opportunities, expand your vision, and strengthen you. He will give you the help you need to meet your trials and challenges. You will gain a stronger testimony and find true joy as you come to know your Father in Heaven and His Son, Jesus Christ, and feel Their love for you.
While this pamphlet has definitely experienced many changes over the years, the basic idea is the same. Live worthy of being in God's presence and you will be happy.
I know this quote isn't very "Mother's Day"-y; however, I wanted to make the connection. I have been blessed with incredible women, not just the woman who gave birth to me, who have taught me exactly what it means to be a righteous woman. From young women leaders to neighbors, friends' mothers to aunts, grandmothers to my own sister. These plus my own incredible mom, have paved the way for me to follow.
The way to find out about happiness is to keep your mind on those moments when you feel most happy, when you are really happy -- not excited, not just thrilled, but deeply happy. This requires a little bit of self-analysis. What is it that makes you happy? Stay with it, no matter when people tell you This is what is following your bliss.