Goal setting is the starting point for long distance triathlon. You set the target and then develop the plan to achieve it. Throughout the training phase you will be faced with dips in motivation and other distractions, but, with the goal set, the reason to stay on target and complete the training remains, making you more likely to turn up on race day ready to do the best race you can.
The same approach can be applied to other challenges we face in life. Take type 1 diabetes, I like to challenge myself to stay within the BGL target range of 4 - 8 mmol. Consistently targeting good BGL results helps to focus me on doing the things I need to do to keep my BGLs under control. This includes keeping up my exercise, test my BGL regularly, avoiding sugary foods and making sure I get my insulin doses right.
I know that this is helping me to reduce the risk of diabetic complications in the future.