Sundays "OFF"?

So what are your thoughts on Sundays "off" during lent? It wasn't until recently that I heard that Sundays during lent are "off" days, and are not counted as the 40 days of lent. I always thought of that as an excuse to cheat, but now I am wondering if I should reconsider. But I feel like I've done well these past few days about not snacking between meals and not having any sweets or junk food. The one exception I did make when I was deciding on what "bad" things to remove from my consuming was that I would allow myself soda on the weekends - and when I have pizza (a pizza just doesn't taste the same if you don't have soda with it). Well yesterday I did have pizza AND it was the weekend (so I followed my rules). I hate to break my "being good" streak - and I'm actually losing the cravings for all of those sweet treats. So tell me what you think and how you've been doing so far with your lenten resolutions.