Have a play, and see which methods work best for the different situations you come across. This page has a free Windows utility for download - SplitWin. It lets you break up a binary file into user- specified sized chunks, and is really great for splitting a large file across multiple floppies. But even if they have the best training, they're not ready yet. To become one of these experts who can mentor others takes around 3 years.
Some people never make it.
You don't have a chance unless you are teachable and have personal drive. Good debuggers, though, know that there has to be a reason. But these types of electrical problems are rarely consistently reproducible. When the programmer was seated he was a touch typist and the problem went unnoticed, but when he stood he was led astray by hunting and pecking. This newsletter may be freely distributed provided it is not modified in any way.