"Any idiot can face a crisis – it's day to day living that wears you out." – Anton Checkov.
The above quote sums up one of the secrets of success – and one of the reasons for failure – in people's lives.
First, just because you can deal with a crisis does not mean you can deal with non-crisis issues. You can rally your energies in the face of a crisis that's great – then again so can many of us, as adrenaline is a wonderful motivator. In fact I find a surprising amount of people do well in a crisis (often better than they think).
However, dealing with crises is only part of life, and (hopefully) a small part of it. Dealing with crises is important to survival, but crisis management rarely builds anything.
That's why the day to day living, the daily grind, is the thing you really have to cope with.