Mix peroxide with water in a spray bottle. The solution should be 50% water and 50% peroxide. Spray it on your hair, comb through and wait 15 minutes for all over lightening or natural highlights.
I honestly wouldn't. I've had to many friends do it themselves to not only have hair fall out but also discolorations (one girl went gray! ) and splotches. It's worth it to just fork over the money and get it done by a professional.
There is no safe way to dye your hair peroxide brings out the total red pigment as well as drying your hair out beyond recognition. This happens because there are no toners in peroxide.
First do a strand test with a few strands of hair. In a spray bottle put a 50/50 solution of hydrogen peroxide and water. Leave it on for fifteen minutes and then rinse.