The core point of the article is sound -- you should strive to get the most out of every dollar. But there's a danger in spending too much time optimizing expe

The core point of the article is sound -- you should strive to get the most out of every dollar. But there's a danger in spending too much time optimizing expenses in ways that ultimately don't provide much return. You might spend an extra 15 mins a week looking for coupons that'll trim $0.25 off a package of toilet paper. But over the course of a year, you've only managed to save $13 -- at the real cost of 13 hours. That's not a good optimization if you believe an hour of your time is worth more than $1. It's like changing all the double-quoted strings in your PHP script to single-quoted strings because you think it'll save a few cycles during parsing, when you really should be spending that time optimizing your I/0 calls.