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I regularly encounter people who tell me that time management is not for them because they don't like planning. If their perception of this discipline is spending hours sweating over daily, weekly and monthly charts and never being able to feel spontaneous, then I don't blame them for feeling that way. It wouldn't be for me either!
How you do it and the level of sophistication is absolutely up to you, but know this:any planning system is better than none If you don't plan at all, you won't have control over your life and others will. If you don't have a method and a habit of planning, then get one!