I see a lot of people that will blog for their career about something that's happened and worry about publishing everything all at once. You don't have to get your thoughts out there all at once, unless you're a journalist of some sort. Even then, it pays to built a following.
A couple of reasons. The first is that a steady set of blogging, or volunteering shows a bit of commitment and follow-through. It's more impressive to say that you've blogged every week for 6 months than to say you've written 30 posts.
It also keeps you in people's minds if they see you posting something regularly on your site or your entries appear in their blog reader. I know when I a post appear in my reader from someone that hasn't posted in a long time, I wonder what they've been doing.
The last reason, and this might be the biggest one, is that if you schedule things out, especially related items, it gives you a chance to respond to comments and revise them.
Don't get caught up in the idea that all your blogs need to publish right away. Schedule them out over time, at a pace that fits your life.