You can create a linear plan or organise your ideas on a mind map. It doesn't matter how you plan, as long as you bring all the key ideas together in one place and show the order in which you want to present information.
There are many different ways you can plan what to include in your assignment. You could organise information on mind maps. Try free versions of mind mapping tools such as Coggle, bubbl.us, mindly or wisemapping.com to record and structure your ideas.
When planning a report, first decide which sections you will include. The structure may be explained in your assignment documents, or you may be free to choose your own structure and section titles. Once you have planned your section titles, consider which information to include in your report, where it should be included and in how much detail. Remember that report sections have different purposes. For example, a results section will be technical, factual and descriptive, whereas an analysis section will involve interpretations and explanations. See section 1.3 Reports for further guidance.
Essay plan structure
The way you plan will depend on the objective of your task, so consider which structure works best for your assignment before deciding which information to include and where to include it. Below is a template you could use to give structure to an essay: