The house is a mess. The bills are overdue. I missed a deadline. I haven’t signed my son up for a single summer camp or planned the family’s summer vacation.

I’ve been too busy blogging. For the past month I’ve posted here every day. 31 days, 31 blog posts – a couple more actually because some days I wrote more than once.

Why spend so much time writing for free, something that I counsel other writers against?

Because for the second year in a row, I hosted a month-long blogathon for freelance writers. This year close to 45 showed up. Together we blogged through weekdays, weekends and a holiday. We held a guest post exchange and wrote on another writer’s blog for a day. We encouraged each other on Twitter. Tomorrow we’ll be back on Twitter for a blogathon wrap party. You can tune in too, just follow the hashtag #MayBlog2.

When I thought up doing a blogathon last year, I only had a few month of blogging under my belt. My posts were sporadic and I didn’t know much about traffic or SEO. The blogathon was a way to stick to a schedule, teach myself about blog promotion, and bring a few friends along for the ride.

This year my blogathon goals were different. Over the past 12 month, I’ve settled into a regular posting groove, learned about promoting my work, and seen traffic grow 10 fold. For me, this month was about tackling subjects I’d wanted to cover but hadn’t made time for, like putting together this list of top 25 digital media trendsetters. I also used it to build my “brand” to get recognized in the industry I blog about, and getting to know other writers and bloggers better, especially those that cover what I do.

By those measures, the month was a success. At the same time, and just like last year, the best part was having friends along for the ride.

For most, if not all the writers in this year’s blogathon, blogging is still a side project, an early morning or after hours gig we do in addition to our “real” writing, the magazine or Website assignments that pay the bills. But I predict that for more and more of us, blogging will be the assignment, whether it’s for a publisher we already write for, at HuffPost to drive traffic to our other work, ourselves to promote a book or project, a hyperlocal news site, or ghostblogging for a corporate client.

So there’s a solid business case to be made for a freelance writer spending time becoming a better blogger. In 2009, blogging is a skill every writer has to know.

What have you learned from the blogathon, or from your own blogging practice? Feel free to leave a comment. I’ll include some of the best along with other lessons learned from Monday’s blogathon wrap party in an upcoming post.

Dear Michelle,

Dan Baum

Dear Dan,

Thank you. But please reconsider your decision to take down your blog. I looked and it’s obvious you’re good. You’ve written for The New Yorker for Pete’s sake, my favorite magazine of all time. You’ve gotta be doing something right for them to run your stuff and whatever it is, I’d love to find out, so there’s reason No. 1 right there.

There are a lot of other reasons why freelance writers – or other freelancers for that matter – should blog, if only as a writing prompt to get the juices flowing for paid writing gigs.

A few:

* To build expertise in an area you want to pitch – Not that long ago I was re-establishing my freelance writing business after extended hiatus to raise three kids. I needed to get back up to speed on the tech beat I’d previously covered and the best way to do that was to plunge into the wonderful world of Web 2.0. I started the blog, signed up for LinkedIn, then Twitter and started pitching as I learned.

* To build a community – No man is an island, and that includes freelancers. We don’t get the perqs of working in an office surrounded by peers, so a blog can function as a virtual coffee break room, where we exchange suggestions and gossip with far-flung friends.

* To put your resume and clips online – If for no other reason, writers should have a blog to get their vital stats online. Plus, it’s easier than creating a Website and cheaper too.

* To keep colleagues, friends or family up to speed on what you’re doing – Easier and less spammy than sending out group emails.

* To practice a genre other than the one that pays the bills – A blog might be just the thing for writing the poetry, essays or short stories you’ve always wanted to try. If you don’t want anybody to see it, you can change the settings on the blog software you’re using to block it from public display.

* To start a book or promote one – Which is something you’re already doing for your book Death and Life in New Orleans, so I’m preaching to the choir on that one.

* To be ready for the digital revolution – As corny as that sounds, the media business as we know it is changing, and not just because of the recession, and it ain’t ever going back to the way it was. If writers don’t want to be left behind, we’ve got to put new techniques alongside the old ones in our storytelling repertoire.

That’s what I came up with in about 10 minutes. There are plenty of other equally good reasons why writers should blog. Please don’t give up on it just yet.

Michelle