“To not see the promise afar off means its short-lived.” DC JAMES
Take a look at the different milestones you’ve identified for your projects and consider which ones are suitable points at which to measure.
If possible, try to set a benchmark to measure against. Whether it‘s sales, awareness, volume of correspondence, attitudes or some other measure, you can make a much more compelling case that you’ve been successful if you can show a before/after comparison. That means, of course, that you should also measure at the end of the initiative to see whether you’ve accomplished your goals.