I have good routines, but even so they still require a concious effort.
An example, hm... showering?
People think "showering" - that doesn't seem like a long or even particularly complicated task to them. Many of those actions required to shower don't need most of their mental capacity. They have them automatised to varying degrees.
I don't, because of my ASD. That's why "showering" to me is "going to my my drawers, opening my drawers, picking fresh clothes, closing the drawers, going into the bathroom, shutting the door, putting soap aside, putting towels aside, turning on hot water, waiting for the water to warm up, getting undressed, getting in the tub, showering (which requires a lot of small actions, but for the sake of sanity and privacy I'll stop here)..."
So many things to do, so many things to keep in mind. Autism can be quite annoying in that aspect, but oh well.
When I figured that might have to do with my autism and ADHD, it proved to be helpful to write tasks down.
I broke up tasks such as "showering" "getting up in the morning" into their individual parts. Then I followed that list, no deviations, to learn it by heart and hope to get it automatised. It saves time and energy and it helps knowing that tasks that appear to be lengthy and complicated realistically take up only a couple of minutes.
In the beginning this takes more effort until you get used to it though.
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Autism + ADHD
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The trouble with having an open mind, of course, is that people will insist on coming along and trying to put things in it. Terry Pratchett