When writing an essay about free will, it is important that you understand the subject fully. This includes having an appreciation of other concepts, such as determinism. If you start to write the paper without having researched other ideas, then you will be highly unlikely to create a piece of work that captures all the important points surrounding the concept of free will.
Whilst your essay may be very subjective, in that you are arguing your own beliefs as to whether or not free will exists, you should also look into the work of other philosophers during your research. As a result, you be able to include other ideas and theories as well as important quotes on the subject.
Essentially, this is just like any other essay, and you will need good evidence to back up any arguments that you try to make.
When writing the essay, you want to think about the structure beforehand. It may be that you go with a very simple concept of an introduction, followed by the body, followed by the conclusion. However, you want to consider how you bring in each argument, and whether or not you can use this in as logical a way as possible so as to make your arguments as convincing as they can be.
The following list includes a range of different topic ideas on the subject free will, as well as aspects of other concepts, including determinism.