These are all great suggestions. If this is a recent / new habit you may (as I think Lauren H mentioned) want to look at why is this popping up now? And see if there is something that might work as a substitute.
Also, are you eating enough at dinner? If I "deprive" myself at dinner I get pretty antsy foodwise an hour or 2 later.
I also like the idea of saving a few points for that time. I get really mad at feeling I "can't"
have something. So I'd rather eat a bit less in points at lunch and have a few more points for a dessert/snack after dinner.
And yes, I also upon occasion brush my teeth to consciously give myself a time out from stuffing my face.