Happier with Gretchen Rubin
Little: Never Have a Crush on Just One Person

A friend in college told me something that I’ve never forgotten, “Never have a crush on just one person. With one crush, it matters too much what’s happening with your crush. With two crushes, if one crush isn’t going well, you think about the other crush.”
I’ve found this to be excellent advice, in all sorts of non-crush situations. Like work. If one project isn’t going well, I can turn to a different project.