So here we go. ^-^
Step one:-----
Cut out yarn! Grab a skien you like or two, or three (how ever many really) of colors you want. I've used two, but many more are easy to add.
You pick your yarn length out yourself. I've got with a strand thats just over a yard long because I want long falls. You have to remember when deciding what length to cut out that you are folding this piece in half. So if it seems uber long and you just want chest length falls, then go with my measurement, if you want shorter, go with less! (Oh and to get those layered looks, go with a bunch of different lengths.)
Now you've got most of a skien or how ever much you feel like using. (I only used a bit of the black skien I picked up which is your basic skien you see at Wallyworld or most craft stores. The green was a smaller skien and I've used most of it. )
Step Two:-----
Cut out holder. I've used ribbon *black* for this set of falls because I wanted to just tie them in and bobby pin for hold. You can use stretchy lace ribbon, elastics (though the falls will have to be really scrunched for most pony tail holders) or basic sewing elastic (like for clothes)

I've used a fairly long piece as I'm loading it with yarn and want to have a good amount left to tie with security.
Step Three:---------
Fold a few strands of your cut yarn in half and lay under your holder.

Then fold the loop the folded yarn has made over the holder.

Lastly pull the ends of your yarn through the loop and tighten.

It should kind of look like a mans tie at the top. ^-^

Step Four:--------
Fill that puppy up! Squish the yarn loops together and put as many on their as you'd like, leaving a tail on both ends thats long enough to tie. (If you used a pony tail holder, just fill it to the brim!)

Step five:------
Pull your hair up in buns and secure with bobby pins. Of course if your just making a single fall, by all means, make one bun on the back of your head. ^-^

I like mine higher than I did for these photos, I was just popping them in to show off. ^-~

I recommend these bobby pins if your doing yours like mine. they help support the weight of the fall and are large enough to go over the yarn and holder. I got mine at the local beauty supply store and I love them. (Also means I only have to use two pins for a bun in my hair, they hold like a dream!)

Now really, that wasn't too hard was it?! ^-^ I love these and can't wait to wear them out. I'll be making some other ones soon though, I've got roving to try and I want to add some foam to some. When I figure those all out I'll post tutes!