I'd start by really pin-pointing your MVA's (Most Valuable Activities) or as I like to call them, your DRPA's (Direct Result Producing Activities).
As a business owner, you need to make more money, so focus on doing just that. Think "what is the best role for me to take on, where I can influence the business, but it's not dependent on me for operation & revenue?"
While I won't second others' suggestions to go to Freelancer or hire VA's - I want you to first understand, what exactly it is that you need outsourced. How much will it all cost? Are you willing to take a lower margin, but take the gruntwork off your shoulders?
My policy is: if you're doing something that doesnt equate to more $ for your business, at the end of the chain...you souldn't be the one doing it.
Before you ask "how do I get more clients?" Look at your current revenue model, can you shift it a bit, and up your engagement with existing clients along with their value in revenue.
Crunch the numbers, see what works and what doesn't. If you need an expert eye, I'd love to get on a call with you to discuss your business model and show you a few things that you can do to make the shift.