(I started to write this as a comment on the previous post after chichimama asked . . . then I realized it was really too long for a comment.)
Bring a big pot of water to a boil.
Wash and prep your kale -- I usually coarsely chop it.
Prepare a bowl full of cool water and dump in some ice cubes.
Line a large cookie sheet or try with an absorbent towel, and have another handy.
When the water boils, drop in the kale. Leave it in there for two minutes, regardless of when or whether it returns to a boil. It should turn a brighter green.
Drain thoroughly in a colander, then dump into the ice water to "shock" it. After it's thoroughly cool, drain it again, pressing the moisture out gently.
Spread it out on the cookie sheet, and press the other towel gently on top to wick out as much moisture as you can.
When it's dry, pack it into a ziplock freezer bag, pressing out as much air as you can. Fold over the top of the bag and then put it into another ziplock freezer bag, again pressing out air.
Label the bag, then put it in your freezer. (If you press the kale-filled bag sort of flat, it will make it more compact for storage.)