When installing a subway tile layout in a shower, how does one install the half pieces that will occur on the ends? Do you just cut the tile in half, flip it so the flat side is facing towards the corner (and not out) and hope that the grouting hides the flat side of all those pieces?
If you're asking about inside corners, yes. You simply lap the two walls. Normally you'd put the grout line on the wall that is parallel to the most common viewing angle so it's less conspicuous. I tend to use slightly smaller grout lines in that situation to conceal them even more.
If you have any reason to believe you'll get movement at the corner, use caulk instead of grout there.