Look, I don't want to be antagonistic, but isn't changing your behavior kind of the point?? Instead of focusing on "giving up" something only to put it right back into your life right after Lent's over, why not look at it as a way to improve your habits? Don't quit caffeine cold-turkey, you've got a chemical dependency. Set a goal for Lent to lessen the amount of it you consume, and maybe decrease it a bit for each week. Make yourself healthy in body and spirit, and don't beat yourself up if you slip because the struggle is all part of it; just keep trying. :)