The best way is always to stop when you are going good and when you know what will happen next. If you do that every day … you will never be stuck. Always stop while you are going good and don’t think about it or worry about it until you start to write the next day. That way your subconscious will work on it all the time. But if you think about it consciously or worry about it you will kill it and your brain will be tired before you start.
-- Ernest Hemingway ( On How to Keep the momentum going?)

When was the last time you stopped doing something when you are almost about to complete it ? Most of us have been baptized with statements that are quite opposite to the above quote. Statements such as “Don’t let something unfinished” . “See it through”, etc. have been drilled in to our heads by teachers, mentors, parents, peers . But may be, just may be, that is not the right thing to do !