I read different articles about promoting your blog on Facebook and Stumble Upon but to be quite honest with you I am not a fan of these two places. I prefer MySpace to Facebook here is my profile url myspace.com/alecalexis2 you can do so many different things with the layout and now they offer apps games trivia etc. I have had MySpace for a few years now I started it as a joke with my nieces they thought I was to old for it. But now it is how I keep in touch with my friends and family from N.J.
I have a Facebook profile but I don't use it I didn't see what all the hype was about. I didn't like anything about it. To each his own though I'm sure there are people who use Facebook and don't like MySpace.
I don't really get the gist of Stumble upon but I am definitely a YouTube fan I have a ton of video's I have gotten from other you tubers here is my profile url http://www.youtube.com/user/lapa36 . I have had YouTube for a couple of years now and I love it. I found music video's there I hadn't seen nor heard since the 80's when MTV actually played music videos. I'm not sure exactly how many video's I have but it is in the hundreds.
I tried for hours to figure out Stumble I finally got frustrated and gave up. If you like Stumble more power to you for figuring it out no judgement here.