Now, you ask, what does this have to do with stock and options trading?  Just as in every day life and in the case of CFIT, stock and options traders must remain focused on the current trade or risk opening themselves up to any number of mistakes.  These mistakes can include (but are in no way limited to)the following:
1) allowing impulsiveness to take over your trading rules, thus taking a trade that does not meet your criteria
2) not taking a trade signaled by your system because your focus is elsewhere
3) trading several different systems or instruments simultaneously and getting the trades confused
4) risking too much on a trade
5) ignoring an exit strategy because you have not predesigned one
6) getting sidetracked by a report or an analyst recommendation on Blue Channels.