Plot your training
Most triathletes periodize their training by focusing on different types of workouts at different phases of the season. But not all periodization is the same. Structure your training based on your race distance.
A traditional pyramid-style periodization strategy may be the best approach if your A race is a sprint- or Olympic-distance event. Begin with a long block of base prep, then gradually sharpen by adding progressively higher intensity workouts to your schedule. Start with aerobic conditioning then incorporate anaerobic/ lactate threshold work, and perhaps VO2max sessions before peaking for their big race.