This concept of small steps is called kaizen.

Robert Maurer explains it in his book One Small Step Can Change Your Life “Radical change is like charging up a steep hill – you may run out of wind before you reach the crest, or the thought of all the work ahead makes you give up no sooner than you’ve begun.”

He suggests another path altogether “one that winds so gently up the hill that you hardly notice the climb. It is pleasant to negotiate and soft to tread. And all it requires is that you place one foot in front of the other.” Small steps for continual improvement.