I place our cams on areas I know the deer are going to travel or on salt/mineral licks I know they are going to come to. A hidden area at the backside of a cropfield is generally a good spot. Well managed foodplots that you know they are coming to. A well beaten path to bedding, food, or water.
Here is a link to some of the pics I got last year
http://www.imbmonsterbucks.com/gallery/cat.php?cat=7