My idea is all about being able to set up "repetitive" goals for workflows that could let us re-enroll contacts who have already met the goal after a certain period if the re-enrollment criteria are met again.
For example, a contact could meet a goal by submitting a form sent through a workflow, but every month/day/week that contact can have the chance to re-enroll in the workflow after the goal was "reset".
Currently, there is some workaround for this but it usually involves creating several properties, workflows, and even lists, which is not ideal, considering how common repetitive goals are.
