I would add to be patient and realistic.
Set goals which are obtainable. Don't say that you're going to lose all of your excess weight in a couple of months. A pound or two a week is making progress. By the same token, you might not depend on your scale as the tell all of your movement toward your goal. If you're increasing your muscle mass, you could be losing inches faster than you're losing actual poundage.
There have been weeks where my weight has increased on the scale. If I've been following my plan, I don't get discouraged. I know it's probably water weight.