Instead of sending a PM to notify players of gamestart, phase updates, prods and other announcements, you just tag the players in the post you're notifying them about.
Generally I spoiler it at the top or bottom of the post to keep it from cluttering things up, like this:
For prods it's just:
@SleepyKrew has been prodded and has 24 hours to post or be replaced.
No PM'ing necessary and no risk of you stepping away and forgetting to follow through. Not saying that sending PMs is difficult, but I think anytime you can cut out unnecessary steps and streamline a process it's worth investigating.