I’m sure this goes without saying, but be sure to clean the floor before starting. And allow it to dry before starting your peel and stick floor tile project.
Find the center of your room. I used my laser measurer and a regular tape measurer to figure out middle.
Once you’ve determined your center, layout the tiles to get a feel for how it will look before you start peeling and sticking. This will also help you see if you should shift it a little or not based on how it lines up with the edges.