Having said that - here are 10 tips that come to mind on how to build a ‘digg culture’ on your blog. They come both from my own experience of having my blogs regularly featured on Digg but also by watching what other successful sites do.

1. Style of Writing - while many hundreds of pages get to the top of the digg pile every week and there is quite a variation in their style - many of them do tend to have similarities. They are often lists and are usually easily digestible pieces that appeal to a skeptical yet reasonably knowledgeable audience. I don’ t know their demographics but I suspect it’s largely a young male audience so your writing needs to be appeal to them. I find ‘how to’ posts tend to do well on Digg, as do posts that break news or that are irreverent to some sort of institution.
2. Topic of Writing - Digg has recently broadened the topics that it covers, however it’s roots are technology based and I find that blogs that have a technology focus tend to have a higher chance of being dugg repeatedly than blogs that are on other topics. This may change with time.
3. Become a Digg User - perhaps one of the most powerful tips I can give you is to actually use Digg yourself. Become a part of the community, be an active Digger (not just of your own sites), watch what stories make it big, analyze their style and topic, make connections with other diggers. Don’t do all this just to manipulate the system but because in doing it you could well learn a thing or two about building a successful site, have some fun and meet some cool people.
4. Get on other Key Sites/Blogs - One way to get highly Dugg is to be featured on other sites with a Digg Culture. For example blogs like Life Hacker routinely have the sites that they link to get flow on diggings. Similarly, other social bookmarking sites like delicious and reddit often bring i a type of traffic which will then also digg your posts. Ultimately the more people that see your post the higher chance of it being bookmarked - however there are certain sites that can send traffic that are more likely to do so.
5. Drive Traffic to Diggable Posts - a few weeks ago I noticed an interesting trend on one of my blogs statistics. It seemed that every Friday (or at least every second one) I was getting on the front page of Digg with one of my posts. This was strange to me as I had not purposely tried to get any of those posts featured in that way but almost as regularly as clockwork they were. Why was this? The answer lay in my weekly email newsletter which I sent, you guessed it, every Friday morning to thousands of readers. While I hadn’t mentioned Digg in those newsletters and had not asked readers to do it - the fact that I sent thousands of readers to a freshly written post all at the same time meant that a certain percentage of them Dugg it (partly because the Digg Culture was already in effect as I’d previously been at the top of Digg on that blog). It struck me that I was onto a good thing so I began to release my more ‘diggable posts’ on Fridays instead of randomly and let my newsletter continue to do its work.
6. Make it easy to Digg your work - I know that some people hate the recently common practice of putting social bookmarking icons at the end of posts but they can at times be the difference between getting your post on the front page of Digg or not. I choose not to use them but if I do see one of my posts rising in the number of Diggs that they have I will generally add a text link at the end of my posts pointing to the Digg page that readers might like to visit in order to bookmark it. This means that not every post on my blogs has a digg button - but those that someone has bookmarked often get enough extra diggs to get on the front page.
7. Titles and first lines are Important - I find that in most cases that I’ve had a post I’ve written submitted to Digg that the person who submits it uses my title (or at least something close to it). In many cases they also use the first line or two of my post as the description. As a result it is important to hone your title writing skills and to think carefully about how you start your posts. Posts that make it to the Digg front page are punchy, informative and draw readers in to read more.
8. Digg Your Own Stories - With Caution - I quite often get asked whether I submit my own posts to Digg. To be honest, in my early days I did, but I found I had a much higher rate of getting to the front page when someone else did it naturally, so I stopped. My attitude is that getting into Digg is something that I want to happen naturally but that once it’s in and climbing the ‘upcoming stories’ ranks that digging my own story is something that I’ll do on posts that I think are worthy of digging. I’ll also pass the digg page link onto a few friends on occasion to help it on it’s way - however this is not something I engage in heavily because I’m much more interested in organic results for my blogs these days. Also don’t aim to get on the front page of Digg every day (or even every week). I’ve found that some digg users actually become suspicious of sites that get Dugg too much - moderation is the key.
9. Celebrate Diggings…. Subtly - If you get on the front page of Digg I think it can be worthwhile to subtly mention it on your blog and/or thank your readers for it. Don’t go over the top with it (or your readers will think you’re boasting or obsessed) but to mention it reinforces that you’re a diggable blog which may trigger other stories that you write to be dugg. Subtlety is the key though - don’t be obsessive or cheesy about it.
10. Quality Content - Ultimately Digg users (like most web users) like quality, useful and unique content. They get frustrated with second rate writing, lots of mistakes, recycled stories and sub standard site design. If you work hard on building a quality website you’ll substantially increase the chances of building a Diggable blog. Once again - don’t be obsessive about it. Build your blog up to be a site that people enjoy and want to come back to and let your Digg culture grow in it’s own time.