I know a woman whose husband died a few years ago, while they were only in in their 50s. They were deeply in love and she feels cheated by his premature passing

I know a woman whose husband died a few years ago, while they were only in in their 50s. They were deeply in love and she feels cheated by his premature passing. When I feel like I'm losing perspective on things, I stop and ask myself: What does she now wish she did more of while her husband was still alive? What does she wish she did less? I find it helps me not to miss opportunities or get caught up in stuff that doesn't really matter.