How do you define a hack? I define it as an undocumented or unofficial alteration that adds a new feature to a system.
Bear that in mind if you read 10 Smart Hacks for Google Reader. It should actually be entitled “How to use Google Reader”, because it tells you nothing more than you’d find at the help pages or by pressing “?”. Yes, “use keyboard shortcuts” is one of the “hacks”.
I’m all for education, but I’m a bit sick of these self-styled productivity gurus cashing in on ignorance.