About 1 week before Thanksgiving... Turkeys & all the fixings go on heavy duty sales. Then Ham, Baking ingredients & other holiday food items start in the weeks after.
So... In your notebook... Write down your menu & ingredients you will need to purchase.
*** also write down any baked good & ingredients you will need for "baking week".
See some holiday recipes & tips here
This week.... get your New Christmas Stockings ordered for your decorations.
Then Starting the week before Thanksgiving, watch the sales & start buying the non perishable & frozen items.
Keep an eye out at the Dollar store (if you have one) & start picking up napkins, holiday ware and decorations. These items sell fast at the Dollar stores & are not replenished.