If you've ever lived the agency life, you've probably dealt with different types of pricing and billing models - time and material, retainer, and flat-rate. All come with their pros and cons, some more risky than others. Are these the only ways to structure client engagements? Rob and Jay do a critical survey of our experience with each of these models; what's worked, what hasn't, what pitfalls we want to avoid, and where we think the future lies.