I have slightly thin/medium hair and I want to get big, volumous hair, how?

How can I style it so I get this big hair effect? Any special products or techniques? My hair's already layered but still flat! Here are some pictures of the style I want:

http://tinypic.com/21l08eq.jpg

http://i17.tinypic.com/2uhsraa.jpg

I have slightly thin/medium hair and I want to get big, volumous hair, how?

i would suggest a root lifter....love the cut .....

I have slightly thin/medium hair and I want to get big, volumous hair, how?

If you straighten your hair, I would try straightening it up and let it fall down and hairspray it, or lift it up and hairspray it so it stays up.

I have slightly thin/medium hair and I want to get big, volumous hair, how?

Well....extentions.....hair cut.......new Shampoo????

I have slightly thin/medium hair and I want to get big, volumous hair, how?

blow dry it upside down. This always works for me.

I have slightly thin/medium hair and I want to get big, volumous hair, how?

beyonce` has a special secret to gettin bouncy hair!! it's a treatment that adds moisture and gives ur hair and extra lift!

1. dissolve 1 plain gelatin pack in 1/2 cup of warm water

2. add 2 tbsp. molasses and 2 tbsp of milk; stir until the mixture is blended

3. apply the mixture all over damp hair and leave on for 30 minutes. rinse well, shampoo, and condition

hope this works 4 ya %26lt;3