Try http://www.dreamweaverbraiding.com/Braid%20Examples/braid_examples_crowns.htm. Let me know if you can do it and if you have any suggestions; I'm quite clumsy with my hair! I'd like to know if you were successful with the crown braid!

Has anyone else tried any crown braids on themselves?

Yup - I've done a crown braid on myself - it takes a little while, and it's a bit slow going, but it came out fairly well - I suggest practice practice practice - that's the best thing to do - sometimes it helps to try on someone else first, but it's very different from doing your own - I typically start from around my left ear and work my way around my head - I typically clip off sections of my hair to keep my space free - I separate my head into quarters basically, leave the lower left quarter free when I start, and unclip the sections as I make my way around my head.

Also - since I have curly hair, I wet my hair down for braiding - it is much easier to handle and they are far fewer knots for me when separating and gathering strands.  This also works well for thick straight hair that slips easily - otherwise if you can do it without wetting it down and it's easy enough to separate, go for it

Hmmm - now I'm not sure what kind of crown braid you mean - the crown braid I know is one braid that goes around your entire head - making a circle like a crown - I don't know what style you mean with 2

Hmm - I'm confused now! On the dreamweaver site, she used two braids and wrapped one around the other! Maybe it's a variation of the crown?

Yes - the official crown braid that I know of is a french braid style but wrapped around your head, gathering hair as you go

and actually - I start at the left behind my ear and go down to the back of my head working my way counter clockwise around my head

I vary it - usually I try to keep it not too far from the hairline so that it's a nice big "crown" around my head - probably about 1.5"-2" or so, but keeping it in closer to the center of your head you'll probably have enough of a braid tail that you can then wrap the tail around the initial crown and pin it in place to make it look like a double crown

actually I have not tried teh double crown...
my hair is to my waist when it's wet or straightened - otherwise, it's about 5 inches or so shorter than that (when it's dry and therefore curly...)