Not take your senior year for granted...
AND (in my opinion) make a point to get to know some of the younger members of your organization, especially the new members. I remember being a freshman and not knowing more than a couple seniors. The rest just weren't involved and weren't around. Now I make a point to know the younger girls. That way when I come back and visit, I actually might know some of the people living in the house. Besides, they keep me young.
