Deliberate Practice for Writers

Angela Duckworth summarizes the basic requirements for deliberate practice (K. Anders Ericsson) as:

A clearly defined stretch goal Full concentration and effort Immediate and informative feedback Repetition with reflection and refinement

Angela Duckworth, Grit 

As a writer, I try to write every day.

How can I make these writing sessions deliberate practice?

A clearly defined stretch goal Productivity: Set a word-count goal for each hour or day. Track your word count in a spreadsheet. Track...