When you start applying to colleges? Any Advice?

Hello, My name is Chris. I was wondering today when you do actually start applying to colleges because I am getting closer to the end of my junior year, and also starting september I'm officially a Senior :). I currently have a 3.5 G.P.A and is also interesting in applying to the University of Albany, Stony Brook University, College At New Paltz, College at Purchase, Hunter college, Lehman, marist and fordham university