I heard something recently that resonated deeply with me. When you remember something from your past, think of it when it was just beginning. Recall how you felt happy and excited at the very start of it, when it was fresh and new. Leave out any concerns or disappointments that came later.
Just let it be a beautiful joyful memory.
For me, the very first thing that came to mind, was Ireland. I remember my first trip there like it was yesterday. I was overwhelmed with joy when I saw the stunning green countryside stretched out before me. It was one of the most beautiful moments in my life and changed me forever.