It might have been Patti Brotherton, a real estate consultant where I first heard about the 90 day rule and it sure makes sense for any business.
Whatever you do today will impact your business in 90 days.
Prospect two hours a day then 90 days from now new business will start.
Do paperwork all day and in 90 days you will not have any new business.
So you have to ask yourself; what was I doing 90 days ago that either has made me successful today or finds me in the same place I was 90 days ago.