Having just got back from the US all "conferenced out", I switch my time-zone on my calendar back to GMT to find about six speaking ops winding their way into my affections over the next month or so.
Luckily Brett Tabke of WebmasterWorld fame has recently posted a rip-roaring guide to speaking in public at conferences and even includes a section on how to survive your spot while nursing a hangover - really well worth a read!