Online publishing has an advantage of extensive reach. There are no restrictions on territory so your book can be purchased and read in any part of the world. Research online publishers, submit your query letter, edit the copy, wait for approval and have your work published online – it is one of the best feelings you could possibly have to see yourself on a virtual shelf in Amazon and a dozen other online bookstores. This is a great course on publishing.
Create an outline or a graphic organizer of the major topics and ideas you want to cover. For example, you might make a time-order chart -- a chart with event blocks to organize events chronologically. Or, you might draw a cluster web -- a diagram with connected circles -- to divide your autobiography into sections, such as one for relevant background information, one for life-changing events, one for special memories and one for goals and dreams. Focus on reasons why specific events, situations and circumstances were important to you and how they made you feel.