How to Stop people from tagging me in their photos

Go to "Settings" and click "Privacy Settings".It will open "Privacy Settings and Tools". From the left side choose "Timeline and Tagging Settings". Lat option says "How can I manage tags people add and tagging suggestions?" Next to it edit "Review tags people add to your own posts before the tags appear on Facebook?" and enable it. Now whenever some one tags you, tou will get it in activity list and you can choose if it should go on your wall or not. You can decline it as well