A lot has changed since Black Friday first rolled out as a one-day shopping bonanza to kick off the run up to Christmas. Today, Black Friday has become a season, starting mid-November and running well past Cyber Monday.Consumers' mindset has also changed. People are now buying less, researching more, and are well aware that the discounts are likely to get deeper as we inch closer to Christmas. Here's what's changed:THEN: Big discounts lured people to buy lots o...