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Fragment:
Software Tester

Because developers don’t expect testers to read through their code, doing so is a quick and easy way to find possible bugs.
Look for comments like “// HACK” or “// fix this crap later.”

Technical Support

When helping someone fix their computer over the phone, and you want them to see if all the cables are plugged in correctly, don’t ask, “Have you checked to see if the cable is plugged in?” because the customer will always say, “Of course I did, do you think I’m a moron?” Instead say, “Remove the cable, blow the dust out of the connector, and plug it back in.” The customer will most likely reply, “Hey, it’s working now—I guess that dust really builds up in there!”