This is something I notice happening a lot. I'll hit up a party or some people, hit it off well, then somewhere along the line I find myself feeling bored, focusing on myself (oh shit I'm not coming off as cool anymore), or find myself just talking out of my ass just to continue a conversation. In the latter example, I'll be talking and in mid-sentence realize that nothing I'm saying matters and the girl knows it too. Then I'll try to turn it into something that matters, and often fail miserably.

What are some tricks you guys use to rebuild your state or minimize the damage done by falling out of it for a bit?