What most naturally follows?

How to cut crown molding
Work on one section at a time.
Start in the least-visible corner of the room, especially when installing molding with a design. This is because it is fairly easy to line up the pattern in each corner as you go, but the final corner will most likely not match.
In the first corner, draw a line on each wall that intersects at the corner along the bottom of the molding. This will help keep you aligned as you install.