Plans and executions differ by leaps and bounds

Very often, one plans how to do something. You will map out the procedural steps on what to begin, how to develop it and finally, how to finish it. Needless to say, countless practises plus re-adjustments galore so that when the time comes for that actual showcase, the perfect piece is all ready to be unveiled. Or so it seems. However, what happens ideally might differ from how it turns out actually. Murphy's Law might kick in at the most unearthly of times coupled with last minute (or should I say second) changes occur and short of throwing it into a disarray, one's mind suffers from the common computer problem: all systems hang. But all's not lost if one knows how to counter the hiccup by thinking on your feet and switching strategy if necessary. However, things might not be as rosy as it seems so the occasional 'bad day' happens.