Most people say that the best source of business usually comes from existing clients.
Either referrals from clients or repeat business.
So, there is something to be said for focusing on this.
But it can feel awkward asking your clients for referrals. I know we are meant to do it, and “if you don’t ask you don’t get” and many people swear by it. Personally, I still find it hard. Being in the UK it’s maybe harder for us.