Below is an outline in mind map format of a speech on appreciation I gave at Toastmasters. I hope you find it interesting.
For more information on how to write an appreciation speech, click here.
P.S. I have added another article on appreciation (as opposed to appreciation speeches) here.
P.P.S. If you are looking for something specific, perhaps you can leave a comment below or contact me and I can provide it here for you.