When sitting around with a good friend solving all the world's problems over a bottle of wine or two, make sure you take notes. No crummier feeling than waking up the next day feeling refreshed and accomplished and realizing that you can't remember a dratted thing. I don't think it's so much the wine as the massive endorphine rush you get when you realize that you've just cured the world of all its ails. That good feeling is what makes your brain turn mushy (anyone who has ever been in love can attest to that fact).
So, keep a notepad handy, just in case.