Change is vital because unless you make a change in your life, nothing will change in your life. You do need to change something, although a focus on changing what you're doing often misses a crucial point.
What enables you to change? Sufficient power - inner power - which includes willingness and motivation. If you are powerless to overcome your self sabotage, how can you change? The larger your capacity to make changes, the sooner you get results. So first put your attention on improving your capacity to change, on increasing your personal power.
create an effective strategy to get where you want to be, and
become more effective in implementing that strategy.
The vital word to change your life in both answers is effective. Being effective is beneficial in any situation, no matter the circumstances.
Let's look at the second part which asks how can you become more effective? Find out what makes the difference! Without knowing what makes a difference, how can you become more effective? So start by becoming aware of the differences that make the difference.
Awareness and Clarity are Crucial
So awareness - becoming aware of what's important - is crucial. Awareness suggests a topic, a subject of which you may have been previously unaware.
Once you have become aware of what you need to become clear about, your increased awareness will then give you more clarity. Clarity suggests a subject about which you have already become aware, one where investing your time and energy will benefit you.
Some even think that information is power. But information unprocessed is only information, it needs to be organized to become useful knowledge. Only knowledge relevant to the circumstances is useful and increases your personal power. The more clear you are about these distinctions, the more effective you become.
Effectiveness needs the awareness of what's important, so first become aware of the distinctions that make the difference. These distinctions give you clarity about what's important, which increases your personal power.