Originally Posted by gibsonnerd
StumbleUpon is great...and can really jump your hit count. You should be flattered that you're getting traffic from it (that means that people have seen your page and given it a "thumbs up")!
I'd suggest creating a profile and playing around with it a little bit...
Yeah, StumbleUpon is worth signing up for just for fun, but if you "stumble" a few of your pages, it will give your site an extra benefit.
Another way to grow your traffic from StumbleUpon is with stumblexchange (search google for it). It lets you exchange positive reviews on SU with other websites. Now, I encourage you to only vote up the sites you find on the exchange that you like, rather than every one, but this still gives you a good boost on the SU site.