If you have Twitter account for business but lack the time to try and find all your clients on there, here's a simple process that works well to give your account a kick.
Most of us should have a contact list in our mail or CRM (customer relationship manager) software that can export all client contacts to a file, or a newsletter subscriber list in which you can export the email addresses.
Twitter has a number of ways to find people and connect. The useful feature we'll use allows you to check your contacts on Gmail, Yahoo, or AOL email services using the Find Friends tool. But you're not using any of these web based email services? Doesn't matter.