If you've made too much... layer your pancakes, waffles, or french toast in parchment and place them in a freezer safe Ziploc bag. You can defrost in the microwave for a minute, then if you like them a little crispier, you can stick it in the toaster oven for a couple of minutes.
Sometimes I make too much on purpose. I love the leftovers on random mornings. I also like to plan a special breakfast into our busy work/school week, the time saved, by preparing ahead, allows us to do this.