Jeffrey Phillips, writing in his Thinking Faster Blog, has a great idea to make meetings better.  He calls it Just in Time Meeting Attendance:

Rather than show up for a meeting and sit through the entire thing, demand that the meeting have an agenda and that the facilitator or leader of the meeting stick as closely to the agenda as possible.  When the parts of the meeting you need or want to attend are complete, get up and leave.  I know this may sound a bit rude, but is it really worth your time and your sanity to simply continue to sit in meetings where stuff is being discussed that a) is not relevant for you b) you don't have anything to add to or c) you could care less about? 

Many of us stay in meetings where there's little left for us to do simply out of fear that leaving will be interpreted as lack of interest  or for fear we'll get assigned stuff if we are not there to defend our turf.  But that's not the best use of your time, now is it?

Imagine holding a meeting where the agenda was tight and you could enter or leave as you were needed.  Imagine being confident that you could enter a meeting 30 minutes after it started, show up just in time to deliver news or listen to the part of the meeting you needed to, and then leave when there was no real reason to remain.  That would be true just in time meeting attendance.

I absolutely love it!