Five Practices of the Sincere Developer provides innumerable benefits, perhaps most importantly that of producing valuable outcomes. When you fully embrace these practices you are, by definition, a sincere developer.

1. Communicate often, letting go worries of wrong, late, failure, etc.
2. Complete a task at least once per hour. If unsure going into the hour then split the task.
3. Write the test first. 100% coverage is unnecessary; full coverage is mandatory.
4. Focus on Single Responsibility Principle; inject responsibilities via composition.
5. Work on exactly what is needed now and nothing else. Never predict what could be needed.

And a bonus practice...

6. Continuously note progress. This practice helps sustain the other practices.