If appropriate, ask your clients for referrals to other businesses where your products/services may have a fit. Referrals are a very good way of getting warm leads, as your clients do the qualifying and priming for you! If you’ve delivered on what you’ve promised and created value for them, they will often be happy to do so. Since can take time and headspace to make these referrals, it can be the case that if you don’t ask, you don’t get. Some clients may prefer to make referrals of their own volition, and will be less inclined to refer if asked for them. If for whatever reason you haven't delivered on what you've promised, instead attempt to resolve and amend the shortfall.