I'm going to build not a deck but a ramp up to my deck. When we rebuilt our deck, I had bought materials to build steps but instead I installed a ramp. My thinking actually was that one day we will be in wheel chairs and need a ramp, but it has been so handy that now I want a ramp on the other side too. I can wheel a full wagon of firewood straight from the woodshed right into the living room. Also, my wife has bad knees and she hates stairs.
So the materials for said second ramp have been sitting in the yard for about five years! ...and YES! I just checked, I have plenty of deck screws!