Personal Assistant help

Hello - we are a dual-career family with two young children and finding that we don't have enough time for all of the personal "stuff" in our lives - for example, we can't take a vacation because we don't have enough time to PLAN a vacation, I have a stack of returns collecting dust that I haven't had time to get to, etc. 

Has anyone hired a part-time personal assistant or virtual assistant? If so, would love your perspective on what worked/what didn't. 

Thank you!