The meditation practice you do has effects beyond just you personally. Recognizing this is quite helpful and a good way to remember it is to dedicate the merit from this sitting for the liberation of all beings. You can just think something like, “May the merit from this meditation period be for the liberation of all beings everywhere.” This helps to counteract any selfishness (“What a great meditator I am!”) and puts you in touch with the fact that we all are interrelated and in this together.