Or even if you do, they'll probably still go wrong anyway p
Not very optimistic! ( I've found that during a forensic investigation things usually go wrong when one is not prepared, or in too much of a rush. A good overall plan/methodology, luving one's work, solid knowledge of core subject area/s (or, equally important, ability to quickly research answers to new issues), attention to detail, mental flexability, and knowing when to take a break, seem to be good preventative measures against unexpected problems.
It may not be optimistic, but what Rich joked about and mentioned is the truth. It's just a part of life, and it's something that no amount of planning or contingency plans can guard you from. (Why else would the author of the EnCE Cert Guide write *remember to Save All* so many times?)
)