Hopefully, if you follow all the strategies, tips and tricks that have been outlined in this blog, you will not hear the sound of anyone snoring during your presentations.
As you look round the audience maintaining that all important eye contact, if you see signs of people getting too relaxed, vary the speed and pitch of your delivery, speed it up, talk a bit louder, bang out more key points and reduce the filler. If they still have their eyes open, give them more eye contact (i.e. look at them more often) you should see signs of a revival after a very short time.
Posted by Graham Young 
Graham Young
A to Z of Business Presentations 