Making the Heart Amulet Locket
The operations can be divided into five parts. You need to know Brick and square stitch. Emily's beadwork site at About.com is good place to learn how. Her directions are clear and the drawings are instructive. here's a link to her site (search for the topic you need to know about):
http://beadwork.miningco.com/hobbies/artscrafts/beadwork/
Or use Carolyn Wilcox Wells Creative Beadweaving. She covers brick stitch (both linear and circular ) and square stitch. I learned brick stitch from Barbara Elbe's books. Here's a link to her page where you could purchase them.
Unless you are using delicas in square stitch, don't reinforce the square stitch rows on the side of the amulet bag (like she recommends after the end of each row) or you won't have enough room inside the beads to attach the fringe.
I. Two Brick Stitch Hearts
II. Connect the Hearts in Square Stitch
III. Fringing
IV. Ruffling
V. The Strap (sounds like a mystery novel)
Part I- Brick stitch Hearts
First you need to make a flat brick stitch
heart according to the chart entitled Chart 1 below with 11/0 seed
beads.
This one was a Christmas present for my niece.
Use Nymo O or B (not D)in an appropiate color with a size 12 beading
needle. Photo "Assembly 1" shows the finished heart. Next you need to
encircle the heart with circular brick stitch shown in "Chart 2".
Drawing "Chart 2" below shows the threading path for this operation.
Where X is marked in the chart, because you
need to add a bead here (or maybe somewhere else) and there is no
bead to loop on to, the bead is looped on to the thread connecting
two beads in the flat brick stitch portion. Photo "Assembly 2" shows
the completed row 1 of the circular brick stitch. 
Photo Assem 3 shows the second row of circular
brick stitch which has a more normal thread path for brick stitch.
Notice the notch where the bead is missing at inner point of the
heart. 
This is important in making the locket heart shaped. Since the circumference of the heart is increasing as you move to higher rows, you will have to add beads so that no large gaps appear. Now with that completed, repeat to make a second heart to be the back.
Part II-Connect the Hearts with square stitch
With the second heart completed, you have to connect them and create the sides. Photo "Assem 4" shows this operation.
Start at the widest point on each of the hearts and string a base row of three beads across for square stitch by coming through the holes of the last circular brick stitch row to the same one on the other heart. You can see now the point of doing the circular brick stitch: to have the holes oriented properly for the thread to come out for the square stitch all the way around. Drawing "SqStitch On Side" shows the start of row 2.
You turn the hearts so that the edges are facing you as in Drawing.
"SqStitch on side", and keep working square stitch across to from the
sides. "Assem5" shows the first four rows of square stitch, but the
photo is taken with the two hearts facing the camera.
Photo "Assem 6" shows the locket with the
square stitch completed from a frontal view. 
"Assem
7" shows the locket at the same stage from a side view so that the
square stitch can be clearly seen.
In the interest of loading this page in a reasonable amount of time, the rest of the instructions are in Assembly part2.