I make multiple sandwiches at once and store them in the freezer. I have 3 kids so I make 2 loaves worth of sandwiches at a time. I spread a little PB on each slice of bread.
Then drop a little blob of jam on every other slice.
Put the sandwiches together and cut off the crusts with a sandwich cutter. This is the Cut n Seal from Pampered Chef but you may be able to find something similar from other retailers.
Save the crusts to feed to the ducks until you find out that bread crusts are actually bad for the ducks, then make them into bread crumbs or stuffing, or croutons. or just throw them in the trash and try not to think of the starving children in Africa.
Put your sandwiches in little plastic bags and place them on a cookie sheet to freeze so they will keep their shape. Once the sandwiches are frozen you can store them in a big zip lock bag in the freezer. Every morning, simply grab sandwiches from your stash to put your kid's lunches together. By lunchtime, the sandwiches will be defrosted and ready for eating.
I also use this bag-and-freeze technique for cookies or muffins for a fabulous school-lunch-making time saver.