IMC Case Study

So...it's still about 3 weeks away, but with 3 conferences/events that are scheduled right around that time as well...I thought I should get an early start on brainstorming for the project.

My job is to select a real-world company that has a specific marketing challenge and write a case study about it....

First I ask:
Any suggestions for companies with obvious marketing challenges--a company with enough history and information as so I can efficiently gather enough information to formulate a case study (that must include graphs, charts, data tables, web links, supporting documents, etc.)

Second I ask, from those of you who have written their own case study:
Do you have any suggestions or tips as to how to make the process of writng smoother and less-stressful [than I anticipate it to be]?

Again, thanks so much. Hope to hear from you!