SuDoku - Progress

Every day I am attempting to solve SuDoku puzzles. Yesterday I finally solved an easy one without a single error or looking at the solution. I gave up trying to solve the medium and hard puzzles. I went back through The Daily SuDoku archives and am printing out the easy puzzles and the solutions. For a while I was placing the solution under the puzzle and not writing a number down until I checked the solution. As my skill developed, I put the solution off to the side and only checked it occasionally. Finally I am able to work through the puzzle without aid. When I finish the easy puzzles, I will start on the medium ones. Fortunately the archive only goes back to January, 2005.