Note: This was presented to the Tampa C# Meetup on April 20th, 2011.
One of the greatest challenges in writing code is that nebulous time when the code is too complex to keep the flow all in your head, and when the debugger gets too much in the way for watching the state of your program as it runs. This is the coding twilight zone in which the quality of the code tends to drop as you add line after line of instrumentation to your code to find that spot where something goes wrong.