Awesome a rebel t2i. I have a suggestion for composition. When using the view finder use the top and bottom focus points and the 4 points that arent quite fully left and right as targets for where in the frame you want your subject. You can even focus with the middle point if you like and move the camera so the subject is at any of those 6 points. Those points are all very close to the 1/3 mark which is considered ideal for composition
This is how I trained myself to keep the subject out of the center.