Pen, paper. Hopefully there's an agenda, for a conference or meeting, so take notes on that. Take photo with phone. Send to whoever else needs to know, e.g.

Pen, paper. Hopefully there's an agenda, for a conference or meeting, so take notes on that. Take photo with phone. Send to whoever else needs to know, e.g. meeting minutes. My notepad is A4 paper cut in half (yeah, A5, but company only stocks A4) with a big bull-clip in the top. When notes are no longer needed, just shred them.