I did some research on how to make effective use of a Virtual Assistant (VA) or Personal Assistant (PA.)
These are the two best articles I found:
Personal Assistant Tips article
Also, while looking for ways to increase operational tempo in business, I found this great video from Evan Carmichael:
He tells you how to delegate tasks and in what order, in a way I've never seen before...despite a business education and 15 year corporate executive history!