The kids and I are giving up TV in our home.
My personal one though is that I am trying to say the Rosary daily. I got a CD of the Pope saying it, so I've been listening to that in the car and also doing it while I am nursing Sarah. So far, so good.
My DH gave up alcohol and cigars. He's doing great too-- I think that one sounds harder!
We also always do the meatless fridays and fasting thing too.
p.s.-- my DH is on the school board for our Church's Catholic School and he just came home from tonight's meeting and told me that the school cafeteria served Hot Dogs for lunch on Ash Wednesday!! How crazy is that!