A nice attitude check is available courtesy of the Holy Father, whose Lenten message is specifically about that practice. Check out this paragraph:
In our own day, fasting seems to have
lost something of its spiritual meaning, and has taken on, in a
culture characterized by the search for material well-being, a
therapeutic value for the care of one’s body. Fasting certainly
bring benefits to physical well-being, but for believers, it is, in
the first place, a "therapy" to heal all that prevents them
from conformity to the will of God. In the Apostolic Constitution
Pænitemini of 1966, the Servant of God Paul VI saw the need to
present fasting within the call of every Christian to "no longer
live for himself, but for Him who loves him and gave himself for him
… he will also have to live for his brethren" (cf. Ch. I).
Lent could be a propitious time to present again the norms contained
in the Apostolic Constitution, so that the authentic and perennial
significance of this long held practice may be rediscovered, and thus
assist us to mortify our egoism and open our heart to love of God and
neighbor, the first and greatest Commandment of the new Law and
compendium of the entire Gospel (cf. Mt 22, 34-40).
I was telling a friend after Mass that I gave up giving up food items for Lenten discipline a long time ago, because what with the history of eating disorders and all, it seriously messed with my head. The guilt associated with the binge/purge cycle, and the guilt associated with breaking my Lenten promises, got all mixed up with each other. On fast days I could think of nothing but eating, and would feel angry and resentful all day.
I have some hope that those are all behind me now, but I'm still cautious about food-related penance. I have chosen a non-food-related Lenten discipline to keep for forty days, and hope to look for opportunities to give up food items in the moment, here and there, a little bit each day. Maybe next year I will not be so nervous about it.
I'm kind of looking forward to Wednesday. I guess it's not till then that I'll learn whether I've been freed, not just from my day in, day out Ordinary Time disordered attachment to food, but from all the other heavy obstacles that made fast days intolerable in the past. I was so fearful and weak, I always broke the fast in the end, one way or another. This year I have hope.