There are many things that can keep you from posting. For me, it started with being really engulfed into EVE, and the old problem: do I rather want to play, or write about playing? It continued then with extra load from work, and a bad cold that disabled me for a week. And then, suddenly, it was several weeks, almost a month, since the last post. And I felt slightly intimidated to start again. With that much of a break, you’d need a killer of a post as a comeback, right? So, I waited even more to come up with something amazing. At some point, I didn’t even read other people’s posts any more because I started feeling bad about just dropping out.
Long story short, rule number 1: never ever stop posting. It’ll just make it that much harder to get back. Write silly uninteresting stuff rather than nothing.