Instead, think about achieving your goals like eating an elephant. How would you eat an elephant? I have always heard the only way to eat an elephant is one bite at a time, which is the same way I look at attacking any project... Bit by bit by bit.
Once you've mastered one change, it is a much better time to move on to the next change than seeking to make multiple changes at the same time. Plus, each of those changes is rarely as challenging in reality as we envision it will be in our minds.
Which element of your productivity practices or workflow processes do you want to change first? Have you tried to improve previously and struggled due to attempting too many changes at once? I'd love to hear your experiences!