Simple Drawstring Bag

1. Cut your fabric to the desired size.
2. Fold one of the short edges of your fabric up 1/4 inch and press. Then fold up again 1 inch and press again. This fold will create your casing for the drawstring.
3. Sew on top of the fold, close to it, to secure the casing. Be sure to overstitch at the beginning and end (go back and forth to secure your stitches.) In the future, be sure to do this anytime you will not be sewing over the line of stitching again, or your stitches might come out. This is especially important if you are going to stress the seam by pulling a drawstring through it or weighing it down by putting heavy objects in the bag...)
4. Fold your bag in half, right sides together. Pin up the sides, stopping where your casing begins. Sew up the sides using a 1/4 inch seam, stopping right where your casing begins.
5. Turn the bag right side out and press the seams flat.
6. Cut 2 pieces of ribbon or some sort of string to desired length. The length is width of your bag x 2 + about 6 more inches for knotting. Put a safety pin through the ribbon or whatever you are using. If it is something that frays easily, wrap it with a little tape before inserting the safety pin. To make it easy to scooch, use the biggest safety pin that will fit through your casing easily.
7. Using the safety pin to hold on to, thread your drawstring into the casing, scooching it along inch by inch. Go in one side, through to the other side, and come out where you started.
8. Do the same with the other ribbon, but start on the opposite side this time.
9. Tie a simple knot to secure your drawstring by holding the two ends of one string even, forming a loop in the ribbon and pulling the end through. You can make the knot quite close to the bag. Repeat on the other side.
10. Cut the ends of your ribbon off even, an inch from your knot -- or closer/further depending on what you want. If your drawstring material might fray, dab it with a little craft glue (like Tacky Glue) or fray stopping liquid (such as Stop Fray) and let it dry.
11. You are done! Dance a jig.
If you try this, please let me know if something is confusing and I'll see if I can clarify.