I find substitution is the best trick for me - if I get the munchies, I've a range of substitute snacks at home which take the edge off and stop me having worse. I bake little cookies with almond/coconut flour to snack on at coffee/tea time (plenty recipes online), or have a handful of nuts, or pork scratchings, a chunk of cheese or a plain yoghurt, all of which are low carb and barely register on my BG levels, but they do take the edge off the appetite. I try and keep temptation out of the fridge and food cupboard, so I've got rid of all the sweetened biscuits, cakes etc, although a square of 85% dark chocolate after a meal is my treat of the day. And if all else fails, sugar free chewing gum is another quick fix.
My struggle at the moment is with eating out - what to order that isn't going to send BG up into the stratosphere for hours. Sometimes its difficult to tell from a description what's in a dish, and there is just so much added sugar and carbs in a lot of dishes, plus a lack of awareness from restaurant staff about the problem.