The rest of his post is pretty good advice, but this is the most important. It will allow the dark meat to cook more quickly since you want that to get to a higher temp than the breast.
Another tip: Take the bird out of the fridge a bit before you want to start cooking it, but put some ice in a bag and cover the breast ONLY with it, so the breast starts at a lower temp than the rest. Don't leave it out for longer than 2 hours for food safety reasons.
Cook it all until the breast gets to 150. If you have a thermometer with an alarm, put it in the coldest part of the breast, and set it for 150. When it hits 150, start a timer. Pull it out once 4 minutes have elapsed. According to USDA guidelines, turkey will be pasteurized at 165 instantly, or in 3.7 minutes at 150. Muuuuch juicier at 150 than 165.
Yes, dry brine (lightly salt under skin) a pre-injected turkey the night before. Don't waste your time on a wet brine, a lot of work for minimal gain. Spend your energy making a better gravy and just do the dry brine, which is the most important part. They under-season the injections for a wide palate and saltier drippings makes for better gravy so it's fine to do it on a pre-injected bird.
Credentials: I have a 2 page outline for how I do my turkey each year so I don't forget any steps.