It’s time for you to create your memoir-writing battle plan. Once that’s done, all you have to do is follow your own instructions. You’ll probably end up changing them once things are underway; be prepared for some experimentation and false starts. That’s part of the process, too. 

By now you should have a pretty good idea of what the book is -going to look like. So let’s plot out the actual writing time, pen to paper, -fingers to keyboard. We’ve got two tracks for you here: one is --time-driven, the other a little more free-floating. Pick the one that suits you best and fill it in.

Time-Driven. Start by giving yourself a year. Some people take three months, some a decade, but a year is reasonable. Get your -calendar, and mark each month with a big (but achievable) goal, like “Write outline,” “Write first chapter,” etc. Then, on each Sunday, write down the weekly tasks that will get you to that goal: -“Interview Mom.” “Write four pages.” etc. On the last day of the month, write in the reward you earn when you meet your goal.

Jennifer Traig, Part II The Autobiographer's Handbook