In life, everything is survival, and your most important resource is time. The time you spend doing, even the time you spend thinking. The planning phase is therefore crucial in avoiding failures and repetition of work. Each second counts and is a measure of how efficient you are, so plan to do it right first. After that, plan to do it faster. Each step you try to optimize will introduce new errors, so ensure that those errors are minimal. Plan, work, optimize, and repeat.