It’s all about goals, priorities and commitments. Participating in long distance races demands following a plan with a tight weekly schedule with different workouts in specific days, merging this plan with your work agenda allows you to make sure you keep the necessary time slots reserved. Eventually it will all just feel natural.
The half Iron Man has the particularity of having 3 different activities in sequence (swim, bike, run), so it requires specific workouts and some days you need to get in two of the activities, so it’s really important to keep things organised and well planned. Sometimes unexpected things happen so you need to adapt, but I learned that training early in the morning helps because unexpected things usually only happen during the day. I also recommend, and it’s in fact one of the most important advises, sharing your goals with your family, friends and co-workers, they will also help to keep your motivation and in some moments join you in the challenge.