Yes, for new business, I meet with business partners and ask for referrals/intros.

For repeat business we make suggestions to the client on other areas they may be able to use our help.  We also nurture the relationship by being on site as much as possible, set up regular (weekly) meetings with the CEO/CFO and become a trusted business advisor.  When a client hasn’t used us in a while, I send them updates to legal changes they may want to consider, or an article I think they may find interesting.  This often leads to a conversation or lunch meeting.