I think the point of it is to see just how your normal diet effects your blood sugar. If it is normal for you to snack between meals then you should continue to do so. If you eat in a way that is not natural to you, then the results are going to be very useful. So unless you are convinced you can keep that kind of healthy eating regime up forever, you're better off monitoring how you really eat, and using that as a starting point for any changes you may need to make.
You might find it interesting to check what your blood sugar levels do on days when you eat your normal snacks, how they change on days when you replace your normal snack with a low carb snack (boiled egg/cottage cheese/celery) and what happens on days when you cut out the snacking entirely.
The glucose meter is a really nifty tool once you get the hang of using it. My first one was a massive learning experience. I was bewildered when I discovered that eating a pizza in the evening could send my blood glucose soaring, and keep it high until the middle of the next day, when other meals of similar carb and energy content did not have the same effect. Even more weirdly, baked potato raised my blood sugar for longer than the exact same amount, of the exact same variety of potato (from the same bag) that had been boiled instead of baked. (Google "glycemic index glycemic load" for the explanation.)
I think the main point of using the meter is for you to learn how different foods effect your blood sugar, and what (comparatively) painless changes you can make to get the levels steady, and within safe parameters.
Try eating your favourite meals and then maybe tweaking them to be a bit less carb rich by swapping some of the ingredients - like using whizzed cauliflower as a pizza base (not as bad as it sounds), to see how the changes effect your blood sugar.
As well as writing down the glucose levels from each test it can be really helpful to jot down what you have eaten, so you can build a database of how foods effect your blood glucose levels.
Good luck with it, and remember that you are doing all the testing to teach yourself, and help you regain control. The diabetes nurse/doctor will be doing their jobs, but they are not really going to be anywhere near as invested in your results as you should be yourself. It's your health, you are the person most concerned by it, and getting control of your glucose levels is going to be your own responsibility.