It's been almost two years since I posted a random picture from our trip to Salzburg, but strangely enough I never posted the mini-tip for inserting a random picture from a SmugMug gallery.  It's actually simple enough.  Just insert an image link which points to random.mg with the album id and desired image size.  The URL ends up looking like this:

http://pictures.little.org/photos/random.mg?AlbumID=1886470&Size=Thumb

You can find the AlbumID by browsing to one of your SmugMug albums then examining the URL.

Go forth and randomize!