Hello Jennifer. Baking chicken breast can indeed be tricky, but it is entirely possible to achieve a juicy result with a few simple adjustments.
First, try not to overbake them; usually, 400 degrees Fahrenheit for about 18 to 20 minutes is more than enough for average-sized breasts.
More importantly, let the meat rest for at least five to ten minutes before slicing so the juices can redistribute properly instead of running out onto the cutting board.