It is true, that sundays don't count in the 40 days of lent, personally, however, I don't see the point in giving up something if it is not at least a little bit hard.
It is all about finding one's strenghts and beating the temptations, isn't it.
I mean, I can easily give up black pudding for lent, since I never eat it anyway.
Or I can give up chocolate for weekdays and then stuff myself on sundays.
Both feels like cheating to me.
The true uplifting feeling of YES, I DID IT! only comes, when you really did it!
And I really don't think God gives a sh*** whether or not you eat chocolate.