Telemarketing easily ranks among the most divisive fundraising techniques. It’s costly and sure to bring in complaints to customer service. However, telemarketing can be essential to running a successful multi-channel program. It can also be the most effective way to reach out to the donors you probably want the most right now: sustainers. Take the right steps to make sure you’re doing telemarketing in the best and most effective way. Step 1: Decide what to…