As Steve started to put together his aquarium, his mom noticed that he hadn't
gathered the tools he would need for the project. "Wait, Steve, don't put the cart before
the horse," his mom said as she watched him. "Make sure you have everything you
need before you begin."
Don't put the cart before the horse means put the priorities first instead of doing other things. Steve started to put together the aquarium, but didn't get the tools.
