From the journal The Army Lawyer comes "An Approach to Cross-Examination," which contains a three-step solution for simplifying cross (pdf). After describing the method, the authors of the article then illustrate it with an example taken from a real case.
The article's subtitle is "It's a Commando Raid, not the Invasion of Europe." The three-step method for organizing cross is simple enough:
"conceptualize the entire case. Ask yourself: 'What argument am I going to make about this witness during my summation?'" "determine what specific factors (attack points) support the argument." "draft particular questions that develop each attack point."
Each step of the method is explained more fully in the article. At the end, there's a worksheet for using the method to organize your next cross.