Death of A Project

Does anyone have a good way to cope with the sudden loss of a big project? We all know that it can happen in this business: IP doesn't work out, if trials fail, or customers change suppliers. I am reminded (depressingly, of course) of Robert Scott's comments after he found that Amundsen has made it to the South Pole first:

It is a terrible disappointment, and I am very sorry for my loyal companions. Many thoughts come and much discussion have we had. To-morrow we must march on to the Pole and then hasten home with all the speed we can compass. All the day dreams must go; it will be a wearisome return.

Readers, what can I learn from the loss of a big project? Before I start tossing my samples in the Big Red Can, anything that I should be doing? Also, which Kubler-Ross stages should I be dealing with? (Kidding!)