Want to start drinking more water everyday? Start with one cup, and move up.
Want to do push ups each day? Start with just one push up each day.

What you have described is what many scientists and researchers have proved through experiments. It is the fact that anyone can change by taking one step at a time.

In fact, there's also a website related to it: http://tinyhabits.com/

We change our behaviors by doing something so small that it is no longer considered difficult. Then, eventually, our brain will do the rest of the things with time.