Obviously this isn’t necessary unless you are using 2 pieces like me.
Make sure you have a flat surface to work on and something to cover it, wood glue is a bitch to clean up! Before any gluing, I put a strip of tape across the boards along the crack between the two to make sure they were lined up perfectly, then flipped them over so the tape was on the bottom and the boards were facing up. The tape also kept the glue from seeping out of the bottom and making a mess.
Now, spread the boards a tiny bit, just enough to make a crack, and slather on the glue! It doesn’t have to be perfect, the glue is just to hold the pieces together enough that the next steps will work.
Once the glue was in there good, I squeezed the boards together as tight as I could for as long as I could, then flipped them on their side so they didn’t get glued to the floor. Peel off the tape and use a wet rag to wipe up any glue mess.