So...

From an excellent book for teenagers that probably isn't so appropriate for teenagers but is absolutely hilarious if you're looking back:

My mom has this funny habit of ending practically all of her sentences like this: "[Random sentence]. So…"

There's another part that comes after the so, but it's either so obvious that it's not necessary to say it, or she doesn't quite know what it is and gives up trying to figure it out.

"I've got to get to work early tomorrow. So…" That means "I've got to get to work early tomorrow. So I'm going to bed early and I don't want anyone making too much noise." Or possibly: "… I'm taking this big glass of bourbon into the bedroom and I do not wish to be disturbed and I'm seriously considering giving you the silent treatment for the next couple of weeks starting now."

More interesting, and sometimes more disturbing, are the mysterious ones where you can't figure out exactly what's supposed to come after the "so."

"Elaine [the old lady down the street] said she's sorry she decided to have children after all and wishes she had spent the money on herself instead. So…"

"When I was growing up, they didn't expect you to go to college. High school was enough. So…"

"Well, they do say if you ignore something, it goes away on its own in ninety percent of all cases. So…"

Source: Portman, Frank. King Dork. Delacorte, 2006.