How do you put a profile picture?
Click on your username, which will take you to your profile page. From there click on the "change" link under your current image, which will give you the option to choose a stock image, or upload one of your own. :)
First go to my q&a click on your pic. then it brings you to a different page you click on the change button select the picture you want then hit the save changes button at the bottom.