Organize by Pros and Cons
Since there are at least two sides to an argument, you can begin by organizing a simple list of pros and cons: all the reasons for, and all the reasons against, the position you are going to argue.
Organize this list from strongest to weakest, for and against. Shuffle them around:
- On the pro side which should go first?
- Should the strongest be at the beginning or the end?
- Where and how should you refute or rebut the cons?
- Do any of the pros counter the cons?
Choose the strongest reasons for your position, the facts which back them up, and the one or two best-known arguments against-those that you know you will need to refute-and start designing the order in which to argue.