We shall never have more time. We have, and always had, all the time there is. No object is served in waiting until next week or even until tomorrow. Keep going... Concentrate on something useful.
Worry is evidence of an ill-controlled brain; it is merely a stupid waste of time in unpleasantness. If men and women practiced mental calisthenics as they do physical calisthenics, they would purge their brains of this foolishness.
Having once decided to achieve a certain task, achieve it at all costs of tedium and distaste. The gain in self-confidence of having accomplished a tiresome labor is immense.