Even when the time control has been reached, there is one situation where you want to act as if it has not: when your position is absolutely lost.
One of the objectives of opening play is to try to surprise your opponent.
Playing without a concurrent critical review of one's skills will simply get you nowhere.
In Chess, at least, the brave inherit the earth
The key to ultimate succcess is the determination to progress day by day.
Unless a player has an 'understanding chess' rating of at least 2400, the amount of significant knowledge that he can impart on others is limited.