Yes to all of the above. I'll add just one. When using stitch markers, always make sure that the one you use to mark the end of a round is a different color or type than the rest so you don't confuse it with the others that are within the round.
I like using lots of stitch markers when I'm working really long rows or rounds. If I'm working 120 stitches, I'll sometimes mark every 25--then, if I lose count
, I only have to start counting after the last marker