Jesse L. Martin

Go back to what's good, what's certain, what's always there. You woke up today. Just start walking. Whatever it is, it'll pass. Time doesn't go backward. That's the one real blessing. It happened; it does you no good to worry. Keep it movin'.

And I think that still is true of this business - which is basically research and development - that you probably spend more time in planning and training and designing for things to go wrong, and how you cope with them, than you do for things to go right.