MAIN POINT. Choose a single topic, and have a clear and explicit idea of what it is you want to say about it. In general, the introduction will have raised a question and suggested some experiments that should answer the question.
Explain the experiments that you have done or plan to do. Point out what results were obtained or were expected and point out as explicitly and concisely as possible what conclusions can be drawn from these results.
Don't spend too much time on experimental details unless these are novel or crucial to getting the point. Summary flow sheets are usually sufficient for outlining your experimental approach.