According to my Digg user page, 47 stories I submitted made it to the front page. There was one thing that all these articles had in common: they were good. Furthermore, for most of the articles I submitted, I didn't really care all that much whether they ended up on Digg's frontpage. In all cases, I just wrote genuine descriptions and headlines that I think serve as a good introduction to the article.
So let's see what the levers are that are supposed to help your story get to the front page.
Build a popular profile on Digg
So how did my first front page article end up there? Sure, having a lot of "fans" (people that have added you as a friend) helps, and I have collected a few over time. However, I still occasionally have periods that none of the articles I submit end up on the front page, regardless of how many people have added me as a friend.
I have to agree with this one: the website must be readable and easy on the eyes. When there's good content, though, this is mostly the case.
Just play by the rules. Besides the fact that having multiple accounts is gaming the system, it also means that you have absolutely no life.
I also agree with the original author that there are betters ways to make your articles popular. Those ways are not, however, spamming your "friends". It's submitted good content.
Obviously, a good introduction is part of an article. Often, it's good enough to just copy the headline and introduction from the article you're submitting, as the author in most cases has already invested some effort into making it interesting.
Lists, guides, subjects
Sure, lists and guides may be useful. That doesn't mean you shouldn't submit other articles that are not lists or guides but interesting nonetheless.
And of course, Digg users have certain interestests. Not just Digg and Firefox, but also the iPhone, Ubuntu, RIAA/MPAA, US politics, whatever. Just submit whatever matches your interests, then it'll probably also match the interests of Digg users like you.
Oh no, someone buried my article
If might be that someone burying your article is devastating for that article's popularity. It might also not be. Digg's algorithm is closed, so you can't tell the effect of burying. It probably also takes into account who is burying your article, and I have a feeling that people often burying articles they disagree with do not really matter that much. Just make sure the article is genuine and you'll be fine.
Not much you can do about the speed with which your article receives Diggs. Just wait and see.
So do you really need to think of clever tactics to reach Digg's front page? No. Just be genuine. You don't even have to be that involved with the Digg community. With Digg's new recommendation engine, this is probably more true than ever, as your stories will have less trouble finding interested people.
And hey, it's just Digg! So what if you didn't make the frontpage? There's always Newsvine ;-)