The amount of fat in a loaf affects how long it lasts, so you could experiment with adding a bit more.
I cut a loaf in four quarters, keep one out to use and freeze the other three in a large zip plastic bag. The pieces defrost fairly quickly. I keep the current piece in a plastic bag between meals ( reusing the same bag, so I don't feel too guilty)
Slicing the loaf and reassembling it for freezing works too. The slices come apart while still frozen (helped if necessary by the point of a knife) and make excellent toast.
A batch of rolls can be frozen in a large bag and used as needed, too.