Be someone who finally does it, not someone who wishes s/he had done it.  Time is a commodity.  Use it.
If you want to write, to publish, to be read, there's no better time than now to see it through.  If you've stopped writing, just start again.  You'll never know if the words you could share will help others if you never share them.  Make the time to write because you want to.  You can do this.