Go easy on overloading on cleaning stuff, cookware, clothes, linens. If you have the time, start making a rough list for the next month on things you will use during that month while in your house. You'll be surprised how little you really need.
Since you already have a check list for your shorter trips you probably don't need a whole lot more. If your present trips are, say, two weeks, then what you pack in the way of clothes and linens should be the same. Then add some seasonal things.
You'll probably want a small supply of stationary, your favorite spices (weed out the ones that expired 10 yrs. ago and you never use), you'll need a complete medicine cabinet and probably extra types of shoes (hiking, walking, dress). Good luck!