I'm doing a ceramic tile shower stall.

Do I do the silicone corners and transitions first and then grout, or vice versa?

If I do grout first, any tips to keep it out of the corners?

Thanks, Terry

I would grout first.
Remove the grout from any joints that you plan on filling with silicone. I use dental type pics to remove the grout before it sets up. Usually about 1 hour or so after installation.

I just silicone over top of the grout. The silicone keeps the grout from falling out if it cracks.