A lot of my job is second-nature now. Making changes, fixing problems, suggesting solutions, pretty easy stuff, although that’s mainly due to experience. But every now and then we have to make a change to a paritcularly complex system, that we perhaps don’t touch very often, which has it’s own specific unique issues that must be considered.
Today was one of those days. My brain hurts! 4 hours of solid focus to make a change that would take 20 minutes on any other system.