Help for Flat Hair

I have straight hair with zero body. Over the years I've tried product after product that would help give it some lift and not weigh it down. I finally found something I like in these aussie - aussome VOLUME products. They are from left to right - Shampoo, Conditioner, Styling Mousse, Spray Gel. I had bought the mousse first but I prefer the gel more. Also when I bought the shampoo and conditioner they came together with a small sample bottle of hair spray.
Here's their website if you'd like to find out more about these and their other products:

http://www.aussie.com/us/index.jsp