I've not been able to shop as easily or regularly as pre-coronavirus events but here is advice around snacking/grazing controls:
* Drink more water
* Have a very consistent eating schedule
* Don't buy things from the store that would be bad snacks or too much of a temptation
* Buy an abundance of snacks that are 0 or very low net carbs - cheese sticks, high fiber nuts, olives, Atkins bars, boiled eggs, salad bags, carrots
* Pre-make some egg + almond flour keto bread and keep in the fridge - for more substantial snack you can toast those and spread some flavored cream cheese on them
* Game-ify your eating to be around your testing. Meaning, since you don't want to be testing your levels until 2-3 hours after eating, the ritual becomes that you don't want to taint your testing and therefore will always test before a meal and 2-3 hours after the first bit of a meal (my methodology is either 3 hours after first bite or 2 hours after last bite). This helps me to control snacking.
* The lower carbs your diet contains overall, the less you will feel hungry anyway, so once your diet is controlled this will be less of an issue.
* Keep in mind that a lot of low carb options, particularly in the snack variety, will end up having higher cholesterol added to your diet (due to being cheese or egg based) and thus your triglycerides will probably go up even if your other "bad" cholesterol numbers go down from having a low carb diet mixed with regular exercise.