I haven't done one in a few years and at that time I took notes.

I text, email & search for active homes on the MLS.

Good morning Paul. Certainly answering emails.

Taking notes I find important

Email. Then I lose the point of the webinar.

I do admit that I do not give them 100% of my time either. I do take notes tho.

Paul - I try to take notes if I really think I am learning something. If I'm not getting much out of it, I will typically start doing other things.

I mainly do try to watch the webinar, but I might also balance my checkbook, or clean off my desk area. 

I have two large monitors on one powerful PC. I am practicing the work they are teaching.

taking notes and trying not to miss anything.

Paul,

I like to prepare for webinars. So, you will find me taking notes while i enjoy my snacks or answer a call.  I don't want to miss anything.  While i snack, or answer calls,  I mute myself. I don't like it when i hear other people conversation in the background.

Checking email or taking notes of things I need to do. I also take notes on the webinar. 

Paul, depending on what the webinar is, I try very hard to devote my attention, but if the phone rings and is important, I take it.

Usually answering emails, organizing in box, etc.

Do other working during parts which are boring or worthless.. 

Paul,

Not taking calls, likely to look at mail, and I do take notes if something strikes me. A

ah..you busted me!  Usually answering emails, organizing in box, etc.

Depends, if it's good I take notes, if not I'll be working on my website, answering emails etc.

I don't watch that many.  Often when they are boring, I'll be answering email and doing other work.

James nailed this one!