Warm feet is a must. I use and carry extra packs of those stick on, disposable toe warmers. The trick to them is to stick them on the top side of your sock, not the bottom of it. A pair of warm gloves, with a pack of hand warmers.
I carry 2 knives-a Swiss army with a saw, and a Randall trout & bird. A Buck 102 is a great field dressing knife too. Have at least 1 way to make a fire, just in case you get marooned out there. The dragging rope or harness is a good addition. Bottle of water. Chocolate. Maybe a PB & J, or a can of ravioli, or an MRE. I generally don't eat when hunting, I can eat later on. It makes too much noise.
Of course, a compass, or extra batteries for your GPS. Extra ammunition. The book is a good suggestion. 2 emergency ponchos. I have one of those small, fold up seats, kind of a pain to carry, but it makes things much better for long hours on a stand and it is worth it. If you are in your 20s or 30s, you might not need one yet.
There is an art to what you pack in, and how you arrange it all. As you will find out. Most of the gear you see in stores is crap you don't need. You should have a lot of fun out there. When the first legal deer appears in front of you, don't get nervous, stay as cold as ice-you can get excited after you're done putting it down properly. Above all, BE VERY PATIENT. Be still and absolutely quiet. Tune in to the forest around you, pay attention to sounds of single footsteps, snapping twigs, and red squirrels scolding something. It is amazing how quiet a 100+ pound deer can be as it moves through a forest. You can sit on a good stand for 2 or 3 days here in New England, before a deer shows up on it.