My experience with many conferences is that only a few sessions turn out to be worthwhile. If I'm there for 3 days with 5 sessions per day, perhaps 5 or 6 of th

My experience with many conferences is that only a few sessions turn out to be worthwhile. If I'm there for 3 days with 5 sessions per day, perhaps 5 or 6 of the sessions I attend will be interesting, but in the other 9 or 10 I will know within the first 5 minutes that the presenter is unlikely to say anything interesting/educational. But what am I to do? Get up and leave? That's mildly rude and other sessions are probably already full. I don't have anywhere else to go and I paid to be here, so I might as well sit through the session on the off-chance the presenter might say one or two things of interest. Meanwhile, all those people back at my company who are still working are sending me emails, and I have other actual low-focus tasks I can be knocking off my to do list, and there's random web surfing I can be doing, all while keeping one ear tuned to the presenter. Frankly, if I only focused on the presenter's irrelevant talk, I'd probably fall dead asleep. Even if I didn't doze off, I would be fighting to keep my eyes open and not getting anything else done.