It’s easy to make New Year’s resolutions. Keeping them, though, takes a resolution that many, well-intended people simply don’t have. For those whose plans are to lose a stubborn 10 pounds or run a first-ever marathon, the consequences of failure are minimal. For teenagers who have spent at least some of 2011 stoned, drunk and in front of a judge, failing to honor their resolutions can have lifelong results. In Marietta, Ga., five high school students who are participants in the Cobb County Juvenile Drug Court talked about 2011 and looked ahead to 2012.