A mind map is a fun way to explore all the different ideas you may want to include in your writing. This will also help you to sort out similar topics when it comes to organising afterwards.
Before creating the draft, you need to know what it is that you are planning to write. Once you have decided, whether it is a letter or story that you want to write, you can look at style models to help organise your ideas.
Planning a draft is the process of thinking and creating a first version of a writing.