When one door of happiness closes, another opens; but often we look so long at the closed door that we do not see the one which has been opened for us.
In race-walking, you're supposed to keep one foot on the ground at all times. But it's commonly broken because, seriously, who would want to watch feet all day?
When planning your wedding you make so many decisions: 'Do I want this fork or that fork?' But in the end people aren't going to remember what napkin holder you choose.