Hey Ronald, I think this is a common question.
The textbook GTD answer to this is typically some sort of checklist or a calendar item like an all-day event (since it is day/time-specific). I have used both with some success. With the rapid expansion of technology, the tool options are practically endless now.
Some GTD principles to keep in mind in selecting and utilizing a tool for this:
- Intentional reminders - make sure the tool you're using is reminding you of what you need to do, when you need to do it
- Do you need a reminder? - the point of GTD is not necessarily to systemize everything, just the things you have "open loops" on. If it is self-evident when to do something, you may not need a systematic reminder. (e.g. running out socks naturally reminds you to do laundry). This is highly personal, some will choose to have reminders while others may be content without them.
- Avoid overprocessing - this is not explicitly stated in the GTD book but is a major rationale behind the 2-minute rule. If your solution for these requires lots of repetitive data entry, you may need to consider another option, as maintaining the system may be taking more energy and time than it is saving you.
Most list manager apps in my experience don't handle recurring tasks well. A few tools I've seen that seem to work nicely are Nirvana and Omnifocus.
I find Google calendar useful as a sort of "electronic tickler." I create checklists as all day events and have it email me the day of. This works mostly for more infrequent routines, like monthly/quarterly stuff.
My answer for the daily stuff has been a daily checklist - I have my list manager app set to open automatically to this list, which I dont actually check anything off on. it just serves as something to review. Screenshot below: