1 to 3 are useful because you'll be doing them so frequently you can't ignore them. Getting code to a working public server was a point of revelation for me as

1 to 3 are useful because you'll be doing them so frequently you can't ignore them. Getting code to a working public server was a point of revelation for me as a new rails developer. It was hard, but rewarding. 4 can be safely skipped until you're ready for it.