Try and make sure you take a reading before and 2 hours after food. This will help tell you how you are reacting to what you have eaten. I also find that if the before reading is higher than expected it is a good incentive to try and have an almost carb free meal.
Also from experience, if you start to feel really hungry between meals, particularly if you feel shaky, woozy etc, take a reading. When I first started to reduce my carbs I had bad false hypos, my meter was the only thing that kept me from reaching for a snack. It was really hard to sit through it but it is worth it as my body is starting to adjust to the reduced sugar levels.