I know what I'm supposed to be doing - get it running!
My gig is such an esoteric niche that I can usually 'intuit' what's keeping the machine off the road in 3 steps or less. After a few years of hearing customers' descriptions of symptoms it's to the point where I can diagnose it without thinking.
But my favorite projects are when the people give me a blank canvas (or more like a blank check) to work with
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Let's go on out and take a moped ride, and all your friends will thing your brain is fried, but you can't live your life too dirty, 'cause in the the end you're born to go 30