When I see packaging, I have learned to dissect it into sections that I can use on a layout. Of note here, the purple and the black divide the package in half. The main focus is the pumpkin. I can move the title to the rectangular section which is a window to the candy inside. The embellishments include a house, bats, a sign and a pumpkin. I can add the moon or a circular shaped element behind the focal point.
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As you can see, I followed the colors on the package. I used kraft to tone them down a bit. It also reminds me of chocolate. I substituted my journaling in place of the sign. My embellishment are similar to the images on the package. You could easily change the color palette and substitute embellishments for another theme. I hand lettered my title and used markers to mimic the packaging.
Think about packaging like it's a sketch. Look for the focal point and place your main photo there. Then place your embellishments and title around it, just as the packaging does. When you use ads or packaging in this manner, you will have a nicely designed layout. After all, advertising companies pay big bucks to have their packaging designed in a visually eye catching manner.