Enable a type of list (maybe called project list) where you can enter a series of tasks as items. As each one is completed the next one on the list shows up in the start my day list for planning.

You can either schedule it to do today or do it later with a reminder (schedule date)

This lets me plan a series of tasks to complete a project and then uses the start my day process / reminder feature to schedule them.

I don't want to use the reminder feature on its own as I am scheduling dynamically - when I complete one I go onto the next but that may not be the next day, so need to be able to put a date on the next item when it shows up.