I'm definitely going to try #1 (schmooze to support others). I was thinking about this recently and wrote about some of the strategies I use (http://youruisucks.tumblr.com/post/6832529747/so-an-introver...). Honestly, having a goal for an event is the best way for me to keep my human emulator spun up.
The secret of schmoozing is that you don't have to. When you don't really have anything to say (in a particular context), but try too hard to, it almost never works out. It's a better choice to find another context -- one that does engage you.
If you're stuck where you are for a while, or you find it interesting, just listen. Most people appreciate a good listener -- often superficially, sometimes deeply.
