I just watched an excellent video of Don Box talking about a few of the ground rules that he applies to presentations. He does give a good presentation himself, I saw a few at the PDC and he applies the tips he talks about. Runs for about 23 minutes, but worth it!
I hope one or two are familiar to you if you have had any training in presentation skills, but I like the technical spin on this.
I've been quite impressed by the recent material I've found on channel9, but this is real world useful stuff rather than just interesting background information like the SQL Server team videos. You can see the post that the video comes from at http://channel9.msdn.com/ShowPost.aspx?PostID=31792.