I’ve had my share of presentations that have been total flops, along with some very successful ones. I’ve also had good luck with the Kensington 33374 because it only uses the batteries when the USB receiver is plugged into the computer, and when you’re not using it, there’s a secret compartment that pops right back into the presenter so you don’t lose it. One of the “total flops” I mentioned was a workshop that went (I felt) 20 tips for better conference speaking ~ 16 February 2009 ~ View from on stage as I’m preparing to speak at An Event Apart New Orleans 2008.