This morning I was listening to one of the lectures on study that is part of the course on Study Technology: (called the "Student Hat") and L. Ron Hubbard was talking about different methods of study. He pointed out that one of the most basic methods of study is observation. It sounds simple enough but how often do we get into a situation and just go blindly on trying to solve it when if we would just stand back a moment and take a good look we'd see what the real problem was.
So today at work I applied this and sure enough it worked. We were having a problem with getting certain files from the Internet to act correctly once we'd downloaded them. Some files would work fine and some wouldn't work at all. We did all sorts of things to try and debug the situation until finally I did what Mr. Hubbard suggested and I just took a look at the files (internally). Sure enough the ones that would not perform were corrupt and had the common denominator of having been uploaded by a new process whilst the files that performed correctly had been uploaded by hand.
It's amazing what a little bit of observation will do.