Time is your most precious resource, because it is fixed. If you want to deliver more value than you can provide alone, you need delegates to add value.
Your time is best invested in working on items that contribute directly to your vision, and the administration of your business functions can derail you from delivering real value.
When you work within your areas of strength, work gets done better and more efficiently.
When you delegate, communicate a well-defined task by satisfying all of the S.M.A.R.T.E.R. qualifications and you'll have your success criteria established.