To many Honoka fans, her sheer optimism is what makes us love her as much as we do, it just seems so weird to be happy about everything.
Put simply, Honoka was always happy because she always pursued her dream without really stopping. She had a passion, singing, and just went with it, going as far as she could. As a child, she'd always take Kotori and Umi on fun adventures because she could.
If you want to be happy in your life, take her example. This is the real world and we've got a lot more issues, but if you think like Honoka, you'll be more positive.
Everyone has their own way of becoming a more positive person. For Honoka, it was putting her all into what she loved, trying her hardest to become a school idol. To me? It was admiring her smile. It was listening to her songs, it was smiling whenever I could.
As hard as it might seem, you just have to find what makes you happy and do it. Find the smile that gives you power, find the passion that drives you forward. Do that, and the rest will eventually follow.
Sometimes it's not always true, sometimes you'll be sad, sometimes you'll feel bad, setbacks happen in life, but if you push through them, you're hope will always shine. Just think of That time Honoka fell. She couldn't handle it, but even in such a bleak situation, she managed to smile. That's the important thing.
In conclusion. Don't forget to smile and push forward. No matter how bleak it may seem, how sad you may feel, or how worthless it seems. Never underestimate the power of a smile.