I had a couple people ask me how I smock Molly's Witch Costume skirt piece.
There are all types of smocking. This one seems to be the easiest for me. It's simply series and series of knots. It's easy BUT tedious. If I make myself do this I'm usually listening to my ipod for some brain stimulation. I recommend you do the same.
This look also works great for pillows and I've seen bedspreads with the same look although I wouldn't recommend attempting that. Especially if you own anything bigger than a twin:)