I have an issue with this too. It's especially bad on Tuesdays and Thursdays since I get home late, haven't eaten and just "over do it" to compensate.
I try to have lots of hot tea and coffee (black) to keep the hand-to-mouth action going without actually adding calories. Some people have issue with coffee while trying to lose weight but I definitely haven't and am very caffeine tolerant so YMMV. For me, it's just a mental thing I don't need or want to eat but I WANT to eat. Hard to explain.