How has your knowledge of the Plan of Happiness changed/benefited your life?

I always planned on being a wife and mother. I have nine siblings and loved being part of such a big family. I served a mission when I was 21 and then completed my BS and MA in History. Through all of that I wondered but usually didn't worry when I would marry. I never thought I'd actually have a career, but I was so thankful for my education and had a great career at a university for ten years.
When I was 39 I married my best friend. We moved to Alabama where he was a professor of Art. We were able to return often to the West because he was part of a popular men's a cappella group, Voice Male. We were thrilled to get pregnant quite quickly and just ten months after our wedding, our daughter was born. For years I wondered if these blessings would be mine in this life and here I was with a talented, adoring husband and a remarkable, precious daughter.
When she was just six weeks old we received news that shook our faith. My husband had stage 4 cancer. He was remarkable and was blessed to work and serve throughout two and a half years of cancer treatments including surgeries, radiation, and chemotherapy. He served in our branch, continued to work full time, and continued to return to Utah for Voice Male concerts. His stamina was truly a tender mercy.
When our daughter was just 2 1/2 and we'd only been married for 3 1/2 years, he passed away. I am so thankful for the power of the priesthood and for eternal marriage. It has been my experience that when I am willing to ask for and receive peace, it always comes. The Gift of the Holy Ghost is real.
I look forward to the day that we will be reunited as an eternal family. In the meantime, my daughter and I laugh a lot, cry a little, and continue to live "in the manner of happiness". It is knowledge of and faith in the Plan of Happiness that makes this possible.