If you move your eyes to the right, you'll see a box labeled "Connect." It's under the search box, next to my mug over there. While you may not have a Delicious account, there's a reasonable chance you have a Twitter, LinkedIn or Facebook account. Even all three. And possibly Foursquare, too.
I use those three social networking platforms very differently. Facebook is primarily social for me, although I do operate a Facebook page or 2 for businesses. I play Scrabble with my sister and other word games with my mom and some friends. I check in on birthdays. On rare occasions I'll check the status updates, but really, that is pretty rare. LinkedIn is purely business; even the stuff that feels social is business – I'm sharing professional information, and since I'm a sole proprietor, that business life sometimes spills over into the personal (and vice versa). Twitter is a mix of everything. I definitely don't over-share on Foursquare, and I only check in at clients, potential clients, and places I have a comment about. And I only share that on Twitter if I have something to say about it beyond, "I'm here."
Sometimes I find something worth sharing on multiple platforms, though I find that increasingly rare. More often than not, it's a photo shared on a Twitter platform that I send to Facebook as well so that I don't have to upload it twice.
If you're just on social networking sites to be there, that's cool. I have goals. Which is why if you're flooding my LinkedIn stream with the same stuff I just read on Twitter, totally overwhelming other connections who update what they're working on once or twice a week, I've pulled you out of my LinkedIn timeline. And really, a lot of us are on LinkedIn for the professional networking – we don't care if you're sharing ice cream with your kid. Save it for Facebook or Twitter.
I've been doing the same on Facebook lately, too.
This has a further consequence, as well: once I've pulled you out of my stream, you're out. It's not like I go back weekly to see if your practices have changed. If you point out to me that your practices have changed, I may go check, but if I've pulled you out of my stream and tomorrow you have an epiphany and decide to share good stuff on LinkedIn, sorry, I'm not going to know, and I'm not going to share it with my network.
How are you using these platforms, and how do you deal with people who use them differently from you?