In the internal work I do for myself I remind myself that everything that I want comes as a result of practice. Positivity, as you say, can be overdone if the practice of achieving it is not balanced with practice of humility, grace, and foregiveness. Knowing that I am resilient helps me overcome the moments in my life when things aren't going as planned. And resilience takes practice.
I am so grateful for your work. It causes me to notice my feelings and clarify my judgments.
Thank You!
Bruce