It's Friday night—how many of you are looking forward to happy hour? While overindulging is a surefire way to sabotage your six-pack, a drink or two is an easy way to cap off a tough work week. But instead of shelling out big bucks for little drinks at your local watering hole, we suggest mastering your own mixes. We've got a few killer tequila recipes here to get you started. Just remember: Never eat the worm.