Paul and Kimberly are so romantic! Paul started it with a Valentines Day post about how to be a better speaker, giving lots of credit to his lovely wife. So naturally she followed up with a post of her own. If you've never seen Kimberly speak, you really should, even if you don't know anything about her topics. We're often speaking at the same time but the few times I've managed to get free time and sneak into the back of her room, I've been tremendously entertained and learned more about SQL Server as well. I know, too, how much time sweating demos, rewriting things, practicing, and just plain working hard goes into being so entertaining and accurate. You start to get a sense of that by reading these posts - from the tiniest detail of what to wear to the vital "practise your demos" and "show up for your tech check" you can understand that what matters most is caring. If you want to give a great talk you will do all that it takes to give that great talk.
None of their tips are SQL-specific. Read them and you're on the way to getting better. Get out there and do some talks with this in mind, and you're really starting to get it.