"It's a marathon, not a sprint."
I hear this phrase often. I hear it so often that it's easy to forget its relevancy or importance.
This is especially true in the context of goal setting. In the process of crafting your SMART goal, it's natural to want to get everything done as soon as possible, to "get the pain over with quickly" so you can achieve the end.
As soon as you've framed it in these terms, you've turned your own mind against you. This mindset is short-term, and doesn't lead to lasting change.
Re-frame your thinking. Deconstruction is important for figuring out How to do something, but you need to understand your Why, your North Star. Yes, have concrete goals, but ensure they feed into the larger picture of the person you want to become. This becoming process is always happening, and if it's miserable, you'll never realize that final vision.
Fall in love with the process of becoming, and even when things go slightly off-plan, you'll still move forward. You'll still be excited to wake up in the morning and try the next thing.
It's a marathon, not a sprint.