How to Use Stumbleupon to Promote Your Blog
Using free stumbleupon traffic to drive visitors is a great way to get your blog going. If you can manage to be a popular stumbler yourself then you will see lots of natural traffic, if not then you could consider paying for some stumbleupon traffic. As a bonus this is often higher quality than digg traffic because people are genuinely interested in the content that they are sharing.
If you have a good post that you think might do well on Stumbleupon then make sure that you submit it, this will allow the stumblers to vote it up and will bring in traffic. The Stumbleupon homepage has a button to submit a page and there is also an option within the browser toolbar that you can use to share pages on Stumbleupon. It asks for the URL, whether it is safe for work, what interest category to put it in, tags (SEO always helps) and a comment, this should all be completed if you want your page to do well on SU.
Another option is to use a paid stumbleupon campaign to drive traffic to your site, this costs about 5 cents per impression and is pretty affordable compared with other forms of advertising. If you pick the right post to send a paid ad to then it is not uncommon for that page to go organically viral on SU and attract more visitors than you actually spent on the campaign.