Take time to collect and consolidate all the information, and records of your previous experience and achievements. Remind yourself of what you have done and what your feelings were about these experiences. Remember to include all awards you have received, and any talents you may hold.
Always write an autobiography in the third person because this is the most professional, objective way to write. Read texts at the beginning of books, which talk about the author in the third person to get an idea of the tone and tense you should be using; "he" should be used instead of "I."
As well as writing your autobiography in third person it should also be written in the present tense; for example "James currently works as a writer." This will give your autobiography a personal touch.
Always edit your autobiography after it is written. Check through the text carefully making sure you are always using the third person and that there are no grammatical, or spelling, errors.