If you have a hard time sticking to your writing, here's a quick method

U.K. Time management coach Mark Forster has an interesting variation of the classic time log that can help you overcome procrastination. As you probably know, the traditional time log has you write down how you spent your time, jotting it down every fifteen minutes or so. The idea is that you will be able to tell exactly how you’re using (or misusing) your time.

Mark’s idea is to use a time log as an achievement  tool by writing down what you are going to do in the next few minutes. Do it, then jot down the time and the next thing you’re going to do. It might look something like this:

10:35 Set up PayPal Account online

10:41 Order office supplies

10:50 Revise chapter titles for new book

As Mark says, this will help you act out of decision rather than impulse. If you are interrupted, jot down the time when you get back to the planned task and continue.

It's important that you do this one at a time--in other words, don't write down a bunch of tasks at one time. Write down one, do it, then write down the next, and so on.

Try this system when you find yourself procrastinating. Be sure to deal with only small chunks at a time. In other words, don’t write:  “9:30 Write new book”—that’s too big a chunk. The more that procrastination is a problem for you, the smaller your chunks should be.

(There's a wealth of help with writing more, writing faster, writing better in my book, Your Writing Coach, now out in a new edition from Nicholas Brealey.)