When the hour of dire need draws nigh Keep the faculty of effort alive in you by a little gratuitous exercise every day. That is, be systematically ascetic or heroic in little unnecessary points, do every day or two something for no other reason than that you would rather not do it, so that when the hour of dire need draws nigh, it may find you not unnerved. William James, Principles of Psychology wisdomneed
To anticipate all the uses and abuses Success depends wholly on the anticipation and obviation of failure, and it is virtually impossible to anticipate all the uses and abuses to which a product will be subjected until it is in fact used and abused not in the laboratory but in real life. Hence, new products are seldom even near perfect, but we buy them and adapt to their form because they do fulfill, however imperfectly, a function that we find useful. Henry Petroski, The Evolution of Useful Things So that you can get feedback on it and make it betterThe most rewarding iterations productsiteration