Do you have a graphic design firm? Then stop doing your bookkeeping. Hire or contract it out. You are not in the business of bookkeeping.
If you help people organize their finances through financial coaching, then stop designing websites. That's exactly what I did years ago. I enjoy designing websites and I still work on our companies, but I'm not in that business.
What are you doing now that takes away from your real offering? Don't water it down. Get right to the meat or the heart of what you do and do it well.