Propeller was the first social bookmarking site I used. Along with other sites like Digg. For me, i like a social bookmarking site that has ability to vote up/down a news story or link. Also, a site that allows comments. Here's a very good list of the most popular social bookmarking sites (along with a few social networking sites that have bookmarking features). http://www.moneytized.com/top-social-bookmarking-sites-list Please take a look and see which ones are your favorites. Discuss why those bookmarking sites work for you.
Right now, one of the most extremely frequented sites is Tweets. It is a public media website that allows you to discuss and find out something new in an immediate about your family all over the world. Generally, a company or an personal can be made well-known by twitter supporters in Tweets. What this means is that the greater your twitter supporters, the more likely you will get more well-known to people such as prospective customers. In twitter, purchasing twitter supporters seems a logical thing seo suggestion to do if you want to recognition.
Buying followers on Twitter is not a good long term solution. Unless you are trying to artificially inflate your followers to give the impression to potential advertisers that you have an active audience. Still, that verges on fraud and you're not likely to get many long term advertisers when they get no click throughs on the links from your tweets.
Reddit always brings visitors. If you can manage to get a page to the front you will get thousands and thousands of visitors.
My favorite social Bookmarking sites name is Facebook because It's a place people can go to leave you a message, people make your photo collections, or even chat with you while you are online. It can be a great way to keep in contact with friends and family, and even find long lost friends that you haven't spoken to in year
My favorite social bookmarking sites are Digg, Delicious, Pinterest and StumbleUpon, because they are to simple to use (you can easily submit your link) and the thing I love about them is that people can really get to your interesting sites if they interested in the same area as you are (especially with StubleUpon).