If you are among the more than 4.5 million U.S. families that are buying an existing single family home this year, we have one suggestion for your move-in checklist: Remember to reset the devices that control your garage door opener. Just as important as changing your home's door locks or keying, this security step will help prevent unauthorized access to your new castle and also protect everything in the garage including all those boxes you may have staged there as you complete your move and get organized.