What I've noticed is that with my type of diet, the damage of a "cheat" doesn't always show up the next day. Sometimes it shows up 2 or 3 days later. SO that said, I would go ahead and weigh, while realizing that the scale is not always an accurate way to measure progress or the lack thereof. Scales will go up if you are retaining more water, go down if you are slightly dehydrated, will go up if you have undigested food in you, will go down right after a BM.
As long as you take all the factors into consideration then the scale becomes just a number that reflects many things and many conditions.
That is why I weigh every day, and sometimes several times a day. I know what affects my scale, and I know when I've been doing well and even if the scale ISN'T down during those times I know why. I tend to not let the numbers throw me though, because I know that if I've been doing well it SHOULD be lower. It isn't always, and when it isn't I can usually pinpoint why it isn't.
That said, you must know that you need more than one way to track your progress. You might use a tape measure or your clothes and the way they fit as an additional method. Also for me, when I give up weighing every day, that is when I tend to make new excuses for eating the things I want. When I know I am going to face that scale the next day and I WANT it to say a new number, then I tend to be more careful every day what I eat.
That's just me though. Doesn't work for everyone.