Get better in your own time
This is the first, most important step in commercial work. When working on personal projects, you have both the time and liberty to experiment with new software and approaches, but it’s a different game when working on a team project. You can prepare by focusing on experimentation while not doing client work, and thus finding new workflows that can bring new solutions. I’d been experimenting for a while using Sketchup, Keyshot and paint overs, and it’s resulted in a very reliable workflow.