How to model the top of helmet? How can I model this?I have it modeled from the front view, but how can I make it match the right view? What ever I do on the right view messes up the front view. How can I do this? 
Thanks!
you can make your life easier with a mirror modifier and deleting 1 half of your mesh.
In side view (3), select the bottom loop (Alt+Right click on an edge), activate proportionnal editing with O and scale on Y axis (S, Y). while scaling, you can change the proportionnal editing radius with your mouse wheel. click to accept the scaling, right click to cancel.