The simplest use for a wood shipping pallet is to place it vertically against a wall and use it as an industrial-chic headboard. You really don't have to do anything but sand it down to make sure no rough splinters protrude. A consideration whenever using shipping pallets is to salvage the non-pressure treated kind to be certain you aren't exposing yourself to potentially harmful chemicals. If you aren't sure, ask the business you are requesting them from.
Here is another design for a bed frame to consider. More refined in style which means more labor intensive, yet still rustic and achievable. See more of this photos of this project by Houzz user kylemc1985.
The pallet coffee table need not immediately be associated with an industrial-chic aesthetic. It can look quite high-end with a darker finish and architecturally salvaged cast iron hardware.
What about a quick shoe rack? These college roommates turned a pallet into a neat solution for shoe storage and mirror stand.
So, you like the idea of upcycling shipping pallets, but it just won't go with your home's look and you have no interest in sanding for hours? You can use shipping pallets outside too for adorable flower beds. Painting them a bright color is an extra step of attention and whimsy if you so choose.
Another Houzz member used oak pallets found near the Port of Seattle to create a custom hatch door to hide a sunken bathtub. Talk about a unique design element. See more of this 68-square-foot house.
Use part of a pallet for jewelry display.