Decision fatigue really robs you of productivity. Although I don’t naturally tend towards routine and strict timetabling there’s no doubt that some sense of structure is beneficial. Without any regularity in your habits its so easy to waste time debating what to do with the time you have. I find that I become stressed and can’t make wise decisions because I’m bombarded with so many things that need to be attended to and I can’t allocate tasks on reflex because I’m so bewildered with so many decisions - and then you don’t work consistently but neither do you relax properly either. I got my coloured pencils out and created a fluid timetable that allows me some aspect of spontaneity whilst still keeping a sense of purpose and structure. It really clarified my thinking!