Retailers in Louisville and elsewhere are planning earlier hours and more bargains to entice shoppers into stores on this Black Friday weekend, the traditional start of the holiday shopping season.Some stores aren’t waiting until Friday to bring in customers, throwing open their doors Thanksgiving night.The National Retail Federation says more than 150 million people plan to shop this weekend, up from 138 million last year.In Louisville, Reanna Smith-Hamblin with the Better Business Bureau says the most common complaint the agency receives this time of year stems from discount offers."Consumers have to realize that they need to take a look at the ads, read the fine print and realize that maybe that TV that’s for sale that’s a great price, maybe there’s only a couple of them in the store," she said.Smith-Hamblin says consumers with questions about a particular retailer can find information on the BBB’s database.