The first thing to remember when analysing a historical primary source is that it will always be of some value. Most primary source exam questions ask of a source's value, or of its use to a historian, and it is good to remember while answering the question that it is a much better answer if you can find a value for the source. Structure is also very important in analysing a primary source, starting with the provenance, and its context, and then the point the source is trying to put across, whether visual, oral or written, its reliability and then its value. A good structure makes the answer come across strong and clear, and makes it easier to read for the examiner. One key mistake made frequently when analysing primary sources is getting lost in the detail and straying too far from the question. To prevent this, keep your paragraphs succinct and remember to write with a purpose, ensuring that what you are writing answers the question.