I've done a combination of both of the above posts. Sometimes I just go ahead and have a snack but usually not. I am on a misson to reach my goal for the April 1st challenge so my normal practice is to pop a piece of Speariment Trident sugarless gum in my mouth and grab a litre of water and drink it.
I also have this little "thing" that really supresses my appetite and if nothing else distracts me so I don't think about food. I try on clothes in my closet and see how I am progressing. Sometimes DH and I do this together and it's fun! Once I am finished trying on stuff I haven't worn for almost a decade, I am usually motivated enough to put off eating.
Another little trick I do is tell myself (if the hunger occurs at night after dinner and dessert) is that I will be eating again in just a few hours for breakfast and then I promise myself I'll make my fav SBD breakfast (2 scrambled eggs with cheese, 2 sausage patties and 1/2 bowl of whole wheat flakes sweetened with splenda - yummy!) and that's worth waiting a few hours to have.
I hope these suggestions help you out!