In a GTD system, how do I handle a task such as "checking the oil in the car", which should happen once a week or so but is also fairly low priority? My concerns are that
- this task isn't actionable now, so I don't want it cluttering up my next actions list until Saturday, but I also don't want to forget it
- it doesn't have to happen strictly every Saturday, so it isn't useful to put it as a recurring task in the calendar (i.e. if I have more important things to do on Saturday it can wait for a few days)
Where should this go?