I remember Parse tutorials fondly (now mostly open sourced) [0]. When you needed a token or application key in a snippet of code it will be provided dynamically from your selected project so the code is ready to go (instead of "go to a complex config page and copy paste).
I also liked the interactive part where they wait for you to send a request from the SDK and then congratulate you, and display the actual values you sent. It made me feel I was getting productive very quick.