In Rabbi Frand's Shiur last night, he quoted the Tzror HaMor who quoted a Medrash that says that when the wife of Potifar was seducing Yoseph, he was trying to say no. Finally she was able to convince him to say, "Ok not today, but tomorrow". Yoseph agreed, which ultimately saved him from this test.
This is a powerful lesson for us. When attacked with lust that feels so much stronger than us, we can tell ourselves that we'll give in, just NOT TODAY. Often we'll find that tomorrow we'll feel stronger. If not, we can again tell ourselves, JUST NOT TODAY.