An outline is a great study tool that can help you review a subject. You can refresh yourself on a subject as you write the outline, so you could look at drafting an outline as a way of studying in and of itself. Here are some tips to drafting a useful outline.
Read your reference material thoroughly
Before you even begin to write that outline, make sure that you’re familiar with the material. Familiarizing yourself with the reading will give you a better idea about how to structure your outline. If you outline readings as you’re reading them for the first time, you may waste time on ideas that aren’t central to the subject. A good rule of thumb is read the material once very slowly and deliberately, and then once more at a more brisk pace to affirm what you’d just read.