Shake off that hangover and put on a clean shirt: We’ve got business to attend to! These 10 projects are in various stages of planning and construction throughout the region, and include such game-changers as the Millennium Tower, the twin spires at the Christian Science Plaza, and everyone’s favorite parlor game, the casino-resort in either Everett or Revere. The rest are just as big and buzzy and worthy of watching in 2014.